ZWO ASIAIR Ultimate Guide

ZWO ASIAIR - What is it, and how do I use it?

So - the carrier just left and you’ve unpacked all your new gear including an ASIAIR, what now? How do you connect everything? Once you’ve done that, how do you control it all? These are the questions that we’ll be exploring and answering in this guide, so that you can go from being completely new to the system - to starting your first imaging session!

Now ZWO has packed a good amount of functionality into the ASIAIR system and app, and the mobile-control-only approach is something we recognize you may be more - or less - familiar with. Accordingly this guide will be broken up into three sections: the short version, the long version, and the sample workflow.

The short version of this guide will get you through the rough steps of setting the ASIAIR up, turning it on, checking three of the main functions (the main camera, the guide camera, and mount control), and a short overview of the tabs.

The long version will take a more methodical approach, combing through what you’ll be seeing on screen, walking through bench testing each piece of equipment along the way, and generally explaining the functionality you can access at each point.

Whichever path you choose - the short way, the long way, or a mix of both - our video below will bring it all together and show what a sample workflow with the ASIAIR system looks like, so you can set up a basic imaging session!

The ASIAIR Overview

Before we get started, let’s touch on what the ASIAIR system is so we know what it can - and can’t - do.

The ASIAIR is a line of miniature PC’s, of a sort, released by ZWO. The main design philosophy behind these devices could be described as simplicity and accessibility - rather than having to research what programs you’ll need, figure out what type of machine you should run them on, wrangle cables and find a spot to perch your computer, and then solve powering all that… you just buy an ASIAIR. It comes with programs to image/ guide/ control your mount and accessories/ etc., which are all designed specifically to work on the device, the unit mounts right into a finder shoe, and has all the connections on it to simplify power and cable management. Best of all, you just connect and control everything via an app on whatever phone or tablet you happen to have.

The trade off with this all-in-one solution is that you’re limited to those solutions. You can’t install additional programs, plug-ins to expand the capabilities, or use non-ZWO electronic focusers/ filter wheels/ rotators/ cameras. Additionally as the ASIAIR line continues to move further and further away from its Raspberry Pi based roots, so too does this move further away from being something you can repurpose in the event you want to (or have to) move on from the ASIAIR system.

Basically - the ZWO system has been tuned to be easy to use and accessible which makes getting up and running fairly easy, but if at any point throughout this guide you find yourself wanting more granular control or a feature that you don’t see outlined - you’ll likely have to wait (and hope) for it to be added.

A Note About the Guide

Following in the theme of the above section - this guide has been created using the current flagship model ASIAIR, the Plus, with the current version of the Android ASIAIR app and firmware, 2.1(10.74). Consequently depending on what ASIAIR you have some features may not be available; and further as updates become available some options/ features may be slightly different.

That said, the layout and fundamentals will by and large stay the same; and this guide will be updated to follow any major changes.

The Short Version

Step 1 - Setting Up the ASIAIR

  • Connect the USB cables from your equipment to the ASIAIR. Your ASIAIR may have USB 3.0 ports (denoted with blue plastic inside the port); if this is the case, connect your camera(s) to these.
    Note: ZWO’s Pro (cooled) cameras require 12V, 3A, DC power to function. If you have one of these cameras, you will need to connect it to one of the 12V outputs.
  • If you have any equipment that requires 12V DC power that you want to run off the ASIAIR’s DC out ports, connect these cables next.
    Note: These are not intended to run a mount. Connect your mount to a dedicated power supply or separate power port if your supply/ battery supports this.
  • Now connect a power supply to the ASIAIR, ensuring that it is rated for 12V 5A; or if it is lower, that you’ve calculated the demand of your setup and are positive the lower amperage is adequate. The minimum that can be used is 12V 2A, but this is not recommended.

Step 2 - Download the ASIAIR App

  • Navigate to the app store on your smartphone or tablet and download the ASIAIR app. You can also find the download links here.
    Note: As mentioned in the introduction, there is no Windows or Apple Mac app or program at this time - you will need a mobile device.

Step 3 - Powering Up and Connecting to the ASIAIR

  • Flip the switch on the back of the ASIAIR. Once the ASIAIR has powered up and is ready to connect, the ‘WiFi’ LED near the antenna will illuminate. The ASIAIR may additionally beep, depending on the settings.
  • On your phone or tablet, navigate to the WiFi menu. Tap the entry with ASIAIR in the name, and enter ‘12345678’ as the password.
    Note: The full hotspot name and password will correspond with what is printed on a sticker on the bottom of the device; so if you are in a location with multiple ASIAIR devices take note of the name for your ASIAIR.
  • As the ASIAIR’s hotspot does not have an internet connection your mobile device will likely ask if you want to stay connected. Confirm that you would like to stay connected.
    Note: Some devices may not present this dialog and instead jump to another known network, or may do so even after confirming the connect preference above. In this case you will need to look into how to prevent this auto network switching feature on your device.

Step 4 - Talking to the ASIAIR and Initial Setup

  • Launch the ASIAIR app, and tap ‘Enter Device’.
    Note: If this is your first time using the ASIAIR you will need to go through a registration process before you can use the device.
  • Verify that the date/ time/ location data displayed is accurate, or enter it in the event the ASIAIR app did not pull this from your device.
    Note: If this has not been pulled from your device, you may need to enable location permissions. Not all devices have this functionality however, so you still may find this does not populate even after allowing these.
  • Select your mount, and assign any connected cameras to their roll accordingly. Enter the focal length of both your main scope and guide scope (if one is attached).
  • Tap ‘Enter’ to move into the main portion of the app.
    Note: Once you’ve passed this screen it will not appear again until the ASIAIR is power-cycled; however if there is anything from this section that you need to edit, you can do so with the associated setting tabs within the app.

Step 5 - Testing Equipment

  • If you have any devices connected to the 12V power outputs on the ASIAIR, the first thing you’ll need to do is ensure these are enabled. Select the icon that resembles a WiFi or broadcast signal in the top bar, and look in the ‘Power’ section of the window that opens. For each output that you would like to use, make sure the slider is green; if it isn’t, tap to toggle this on.
  • On the right is a vertical bar which will display the current mode, some settings for that mode, and a big circle in the center. Across all modes this center button is what initiates and stops image/ video/ image session captures.
  • At the top of this bar is some text, tap this to open the shooting mode selection menu. Tap ‘Preview’.
    Now tap the center (capture) button. You’ll see a green ring start to form around the button, which will fill up more and more as the image is captured. Once full, this will then return to an ‘empty’ white ring and a status bar will appear in the lower right.
    Once the new status bar fills, the image has been transferred from the ASIAIR to the mobile app and this will then be displayed on screen.
    Note: Tap the ‘Hist.’ icon on the left vertical bar to open the histogram (if it is not already open) and then ensure ‘Auto’ in the bottom right is green. If it is not, tap the text to enable auto-stretching.
    Adjust the exposure time by tapping the ‘EXP’ icon and selecting the desired value.
  • Next to the right vertical bar is the mount control panel. Tap the ‘Speed’ button and slide on the scale that appears until the value reads ‘MAX’. Ensure your mount is clear to move, and then briefly press and hold each arrow key to verify your mount is responding to the ASIAIR’s slew commands.
    Note: You may find the ASIAIR does not automatically connect to the mount, particularly when first using it. To get these two talking, tap the telescope icon on the top bar to open the mount settings. If the slider next to the mount selection box is grey, tap it to initiate the connection. If it is already green, tap to toggle this off and then tap again to restart the connection. If this fails, you may need to adjust the baud rate setting.
  • On the left is an icon labeled ‘Guide’, and if you’re going to be using a guide camera ensure this is green (tap to enable if it is grey). This opens a box in the upper left, under the top bar. Tap this box to open the guiding tool.
    As in the Preview mode, the exposure is set with the ‘EXP’ icon on the right vertical bar.
    On the right vertical bar will be an icon of two arrows circling around each other. Tap this, and check that the status in the lower right corner says ‘Looping’. Once verifying this tap the ‘Stop’ icon on the right vertical bar. Tap the icon of two arrows pointing at each other in the upper right to return to the main screen.

Step 6 - Tabs/ Settings

Along the top row are the tabs for adjusting a number of the device settings. There is a good amount of control you can exert from here, for this short version of the guide however here are the highlights from each.

  • ASIAIR - Power output controls, restart and power off commands.
    Note: If you use the power off command, to turn the ASIAIR back on you will either need to disconnect and reconnect the power supply, or flip the physical switch off and then back on.
  • Main Camera - Gain control, cooler controls (for cameras with the functionality).
  • Guide - Gain control, dark library creation and enabling.
  • Mount - GoTo Auto-Center (toggle this on if it isn’t already), flip behavior, tracking speed, and the ‘Go Home’ command (sends mount to home/ zero position).
  • EFW - Position command (to manually move a filter in place), and the ‘Filters’ menu in which names can be assigned to a certain wheel position.
  • EAF - Current position (to set the zero point), Reverse (in case your EAF is moving the wrong way for your focuser), and the Step settings (to set the maximum position).
  • Files - ‘Image Management’ file explorer to transfer images to a USB drive.
  • About - Reset firmware.

The Long Version

Setting Up the ASIAIR

So you’ve decided that you want to become an ASIAIR expert - well then let’s get started setting up the ASIAIR!

Before mounting this to your setup and routing/ managing all the cables, you’ll want to do a test run - this way in the event you do encounter an issue, it is easy to swap out devices/ cables/ etc. We’ll start with the most basic - power - and work from there.


The ASIAIR runs off of 12V DC through a 5.5mm x 2.1mm input like most equipment in the hobby, but as it also has 12V power outputs you do need to put some consideration in when deciding what to run this off of. Simply put - for most all users, a 12V 5A DC power supply is what you’ll want to power this with.

To add a bit more context for the curious, at minimum the ASIAIR Plus requires 12V, 2A, DC; however ZWO recommends a 12V, 5A, DC power supply if you intend to use the power output capabilities. ZWO has also stated that if you are connecting a power supply that is capable of more than 6A of current, that a 5A fuse should be placed between the supply and the ASIAIR - ergo there is no benefit to purchasing/ using a more powerful supply, only more complication.

Connecting Your Camera, Mount, and Other Accessories

Before turning the ASIAIR on for our test run, let’s connect everything that we intend to use in our setup.

Continuing on with the power theme, connect any devices you want to power from the ASIAIR to the output ports on it. These are all 5.5mm x 2.1mm, like the input connection, and will supply 12V DC (center-positive). Keep this in mind when connecting devices - if you mismatch polarity or voltage requirements, you risk damaging the connected device and/ or the ASIAIR.

The power outputs are capable of 3A per channel - which matches up nicely with the requirements for ZWO’s line of cooled cameras. It is that type of accessory these are mainly useful for; not for mounts. The next paragraph will elaborate, but the short version is - a separate source of power for your mount is just about always a must.

The longer version is this - the per channel current limit for the ASIAIR is too low for most all the popular 25 lbs and up payload capacity EQ mounts. Additionally you can’t get more power out of the device than you put in, which is an easy calculation in this case since the input and output voltage of the ASIAIR is the same - so we can just look at the Amperage. A popular ultra-portable EQ mount needs 2A, which means that if you add a cooled camera at 3A you’ve now maxed out the 5A power supply with nothing left over for the ASIAIR (or any USB devices connected). Now if you were going to run just an ultra-portable mount and then use the ASIAIR with a DLSR, you could be within the limits of the ASIAIR’s output.

A quick note about dew heaters - the ASIAIR does have software control to moderate the power output on a port when a dew heater (or flat panel) is connected. As most dew heaters use an RCA connection however, you will need to source the proper adapter in order to take advantage of this feature (or if you don’t already have a dew heater, looks for one that includes this in the box like the Apertura dew strip line).

With our power connections out of the way, let’s sort out the USB connections. One thing to note is that while the 12V outputs are indifferent to the brand of the connected device, the ASIAIR’s connectivity via USB is not. At this time, while there is support for mounts and DSLR’s outside of ZWO’s ecosystem, astro cameras/ filter wheels/ electronic focusers/ etc. all need to be ZWO brand devices.

Depending on what model of ASIAIR you have, USB connections may or may not be as simple as just connecting one end to the ASIAIR and the other to your device; for example the ASIAIR Mini’s USB ports are all the same specification, USB 2.0. On others, like the ASIAIR Plus, you have a mix of USB 3.0 and 2.0 ports. The USB specification is like phone models - the higher the number, the newer and faster it is. Accordingly, if you have any devices that can use USB 3.0, like a ZWO Pro camera, you want to connect it to the corresponding port on the ASIAIR if your model supports that. The manual should outline which is which, but ZWO products also follow a common convention for USB 3.0 - where these ports/ cables will have bright blue plastic on the connectors and ports. So just check your cable is a USB 3.0 one, match blue with blue, and you’ll be good to go!

One last thing to touch on before moving on here is that USB 3.0 is backwards compatible. This means that if your model doesn’t have USB 3.0 ports, you can absolutely still connect a 3.0 device/ cable to a 2.0 port and have it work; the data throughput will just be a bit slower. In that vein, if you do have 3.0 ports but not enough for all your 3.0 devices - prioritize connecting cameras to these first, mount and accessories after, as cameras can make the most use of that higher throughput.

Downloading the ASIAIR App

You’ll need the ASIAIR app to control the ASIAIR and the connected devices. This is available for Android (Samsung, Motorola, OnePlus, Google Pixel, etc.) and iOS (Apple) smartphones and tablets. Click here to navigate to the ZWO page where you can select the download for your device (Apple or Android)

As mentioned in the intro, at this time the ASIAIR is mobile-only - ZWO does not have an ASIAIR program for Windows, Linux, or Mac machines, so you are limited to a phone or tablet for the time being.

Powering Up and Connecting to the ASIAIR

Now that all the setup is done, we can get to powering this on and start testing the rig out!

Turning on the ASIAIR

First, turn on your mount; and then turn on your ASIAIR. Looking at the back of the ASIAIR, where the power plug and antenna are, there are three small holes for status LEDs. Two are near the DC input port, labeled ‘PWR’ and ‘SYS’. The PWR LED will illuminate to show that the ASIAIR has been powered on, and the SYS LED will begin to blink. Next to the antenna is an LED marked ‘WIFI’, and this will illuminate once the ASIAIR has set up its wireless access point.

As ZWO releases updates, it seems that they do occasionally change default settings as well. One being the buzzer or beep volume, so in addition to the WIFI LED illuminating to indicate this has started up you may also get a beep. Related to this is the power output port settings, which means devices connected to the 12V outputs may or may not power up at start up - if they don’t this means you’ll just have to adjust the power settings, which we’ll get to later in this guide.

Connecting Your Device to the ASIAIR

Once the ASIAIR has fully booted up, we can connect to it. Depending on what device you’re using, and the version of its operating system you’re running, the exact process will be unique and ever changing; and so we will need to be a bit broad here. That’s not to say it’s complex however, so no need to worry - at its core this is the same as connecting to your home’s wireless internet.

That is actually where we’re going to start - in your device settings, navigate to the section where you can add/ change a WiFi/ wireless internet connection. You will now see a list of available connections, amongst these will be one with ‘ASIAIR’ in the name.

The additional letters and numbers after that will match the sticker on the bottom of your ASIAIR; which is handy if you are at a location with multiple ASIAIRs and don’t want to log into someone else's device by mistake. That is pretty easy to do given that the default password has by and large remained the same on all ASIAIRs throughout the years; double check the sticker on the bottom of your device to be sure, but more than likely the password will be ‘12345678’.

Click on the ASIAIR entry that corresponds with your device and enter the top secret password when prompted. Your device will now try to connect to the ASIAIR; note that this will also disconnect you from your home WiFi network. Should everything have been entered properly, you will see your device connect initially - but don’t navigate away from this screen just yet.

Most devices now implement clever behind-the-scenes tricks or features to try and ensure that your connection to the outside world remains unbroken, so that if say - the wireless access point you’re on has an issue and can’t communicate with the internet - it can hopefully find an alternate route before your YouTube video drops and ruins your lunch break. This becomes a sticking point when we’re trying to use WiFi to connect to a device without internet however, as is the case here.

After the initial ‘handshake’ is complete, your mobile device will try to establish an internet connection. When it can’t, most devices will now do one of two things - alert you to this and ask for direction, or switch to another network if one is available. The first scenario is pretty easy to navigate, you’ll just need to tap the option confirming you want to stay connected to the ASIAIR. Your device will then typically remember this choice, and for subsequent sessions you’ll be able to exit the WiFi screen after selecting the ASIAIR’s access point.

If you select the wrong option here not to worry, an easy fix is to click on the settings for the ASIAIR’s access point and then select ‘Forget Network’ or the applicable option for your device. This will reset everything with respect to the ASIAIR access point settings, so you can reconnect as if starting from scratch.

If your device does not ask if you would like to stay connected, some things you can try are turning off mobile data (if your device supports this), and using the above ‘Forget Network’ trick on any other WiFi points you have saved. Essentially this is giving the device no other networks to hop to - but this is less than ideal since this means you’ll have to re-enter WiFi passwords after every session and remember to turn mobile data back on. Our recommendation here is to research how to configure your settings to turn off the auto-switching feature on your device.

Talking to the ASIAIR and Initial Setup

Connecting the App

With the connection established, we can now leave the settings and launch the ASIAIR app to ‘talk’ to the ASIAIR!

Open the ASIAIR app which, after a brief start up, will present you with a screen with the option to ‘Enter Device’ along with some tabs down at the bottom. For the purposes of this guide we’re going to stay on the first tab, as the remaining tabs are for the social networking/ community features and outside the scope this guide will cover.

Tap the ‘Enter Device’ text to start the connection process between the app and ASIAIR. The first time you initiate this process, there will be some registration steps to go through. The on-screen instructions are fairly straight forward for this; though there is one step where you will be prompted to connect your device to the internet to communicate the registration with ZWO.

At that point you will want to leave the app (not close it, but rather leave it ‘frozen’ or running in the background), navigate to your settings, reconnect to your home network or a network with internet access, reopen the ASIAIR app, and hit the button to go to the next step. Once this has obtained the online authorization it will prompt you to reconnect to the ASIAIR; you’ll want to leave (not exit) the app again, reconnect to the ASIAIR’s WiFi in your settings, then reopen the ASIAIR app and continue the on screen instructions. Once you’ve done this for the first time, subsequent sessions will go straight to the initial setting screen.

Another thing you will encounter on occasion is a firmware update prompt. This is more straightforward - no jumping between your home network and the ASIAIR, just a couple on screen prompts and some wait time while the app copies over and installs the update on your ASIAIR.

Initial Setup

You’ll now be greeted with a screen divided into two sections; one with location data and another with a device list. Up in the right hand corner will be the serial number of your device.

Initial Setup - Date, Time, Location

We’ll start on the left with the location information. The time and date will be pulled from your device, and you can see these in the ‘Date’ field. The next two fields are for your location and may or may not be filled in, depending on your device location capabilities and permissions. When this screen appeared, you may have been prompted to Allow or Deny location permissions; the app will work without allowing these, but it does mean that you will need to fill in the Latitude and Longitude fields manually.

If you denied or tapped past the prompt, sometimes tapping the ‘Refresh’ option will bring it back as this will prompt another location data request; though if you click Deny enough times usually your device will learn to stop asking, at which point you’ll need to dive into the device settings to edit the permissions.

Some devices (mostly just tablets at this point) may not have GPS built in. If this is the case for your device, even with location permissions enabled you may find the ASIAIR is unable to fill these fields in; in which case you will need to enter them manually.

Initial Setup - Mount, Cameras, Filter Wheel, EAF, and Scopes

Moving to the right we can see some fields for our equipment; these won’t be set automatically, but after we run through this initial setup subsequent sessions will fill in the last configuration so you’ll only need to adjust if you’re adding or removing equipment.

A quick note on this section - if there is a field for a piece of equipment that you’re not connecting to the ASIAIR, just leave the selection as ‘None’. You can also always connect equipment and set it up after navigating past this screen, so if you miss/ mess up when adding equipment on this screen we will get how to edit that later; it is just a bit easier to do on this initial screen.

Starting at the top is the ‘Mount’ field. Tap the box next to this and scroll through the list, selecting the entry for the mount you’re going to be using with the ASIAIR. At this stage the ASIAIR will generally not initiate a mount connection, and consequently there will be no confirmation message whether the selected profile works or not; but again this can be adjusted at a later stage.

Next are two fields for the focal length of your main scope and then the guide scope, if you’re using one. Now you can keep the main scope as ‘0’ if you don’t know the focal length of your scope - as the ASIAIR can calculate this via a plate solve. However we recommend entering it manually at this stage if you know it. The guide scope focal length can not be calculated at this time, so this you will have to enter if you’re planning on guiding with the ASIAIR.

Now comes the camera selection! Unlike the mount selection, this will initiate a connection at this stage; which is used to populate the drop-down selection boxes. Accordingly, when you tap the box next to ‘Main Camera’ or ‘Guide Camera’ you’ll only see options for the cameras the ASIAIR can currently ‘see’ are connected. If your camera is not present here, then you will need to run through some troubleshooting; that is outside the scope of this guide, but note that sometimes the issue can be related to a lack of external power for cooled (Pro) cameras. As you’ll recall, the power output on your ASIAIR might be turned off by default, and so it may be as simple as toggling this on which we’ll again touch on a bit later.

An important note for this stage, and the app in general - once a camera has been selected for one of the roles, you’ll be unable to set it for the other; so if you accidentally set your guide camera as the main camera, you’ll have to correct the selection before you can assign the guide camera to the proper role.

Last is the accessories section and this is pretty straight forward - if a filter wheel or EAF is connected, you should see ‘EFW’ or ‘EAF’ in these two fields (like the cameras, the ASIAIR does a connection check at this stage). If you aren’t using these, or the ASIAIR isn’t detecting them, you’ll see ‘No EFW’ or ‘No EAF’.

With all these parameters set we’re done with this screen and ready to move on to the main section of the app; so go ahead and tap ‘Enter’!

The Main Screen

There is quite a bit to take in at first, but as you’ll soon see most of the controls are well labeled - and so with just a bit of time you’ll be able to navigate this no problem!

The Top Bar

Starting with the top bar, you have your mobile device information on the left which displays the time and a rough battery level for your smartphone or tablet. There is also the ASIAIR logo; tapping this twice will bring you back to the main screen. Just a quick note, re-entering the device after doing this will skip the initialization screen - if you want to see that again, you’ll need to power cycle the ASIAIR.

Moving to the right are some icons. These correspond to different components, and tapping one will open a window to adjust that component’s settings. For components like the mount, EAF, etc -if the icon is white, then this means the ASIAIR ‘sees’ that component connected. If it is greyed out then it doesn’t, however you can still click the icon to bring up some options; though some will remain inaccessible/ invisible until the device is actually detected.

We’ll be going over these in a bit more detail later in the guide, however if you have any devices that you’re powering from the ASIAIR’s 12V DC outputs it is important to touch one of these tabs early. If you’re not powering anything from these though, you can skip the next paragraph.

Tap the first icon, which looks like a WiFi signal strength indicator, to open the connections menu. In the window that opens there will be a section labeled ‘Power’, in which you can toggle power outputs on and off. In the middle of each entry is a dropdown box where you can assign a name from a list to the output, and then on the right is a switch to turn the output on or off. These are numbered and correspond with a number noted above the physical port on the ASIAIR; so find which port or ports you would like to use and ensure the switch is to the right/ green.

The names are helpful in the event you need to power cycle a device, but they serve an additional function as well. If you are using a flat panel or dew heater on one of these ports, selecting that option will bring up a slider. Moving this around will adjust the power output, so that you can change brightness/ heat.

If you want to turn a port off, ensure the switch is to the left/ grey. Once you’re done, tap anywhere to the left of the window to exit out and return to the main screen.

The Guide Box

Just below the top bar is the guide box which will show a graph of your guiding, if you have that running; and additionally will display some text to give some at-a-glance context to what the guide program is doing, such as ‘Guiding’, ‘Star Lost’, ‘Settling’, etc. Since we’ve just started the ASIAIR up and haven’t engaged this yet, the graph will be empty.

Tapping the box will bring us to a new screen where we can engage the guiding feature if a guide camera is connected. This looks similar to the main screen, with a small set of controls on the left and right of the screen. Starting on the left, is an option labeled ‘Graph’ and this toggles the graph on and off.

When toggled on, this will appear at the bottom of the screen and give you some further settings. First on the left of the graph is ‘X:’, ‘Corrections’, and ‘Clear’. The ‘X:’ value refers to the period of time that the graph covers, where a larger value means the graph is displaying a longer period of time; tapping will increase the value until the max is reached, at which point another tap will circle back to the minimum.

Next is ‘Corrections’, and when this is green (toggled on) the graph will show corrective pulses in addition to the RA and DEC guide info; these are color coded to match the colors for the RA and DEC guide data. Last is ‘Clear’ - and this clears out the graph.

The graph next to those is where information about your RA and DEC guiding will be logged. These will be color coded to match the color applied to the text on the right of the graph. While you can again set the scale for the X-axis, the Y-axis is auto-ranging - which is to say that it will automatically scale to ensure you can see the guide data at all times. You’ll see the scale listed on the left, and can additionally see the numbers for each axis (and a total) next the text on the right.

The last options on the very right of the graph are some aggression and DEC guiding mode options.

On the far right of the screen is a vertical bar with some more icons that are your controls for initializing the guide camera and guiding. We’ll touch on these in the order they appear from top-to-bottom, and then go over what order you would actually use them in.

At the top is an icon that looks like a corner, with a crosshair up to the right. This is a toggle to show some calibration information, and will replace a box with details about the guide star being used. That box doesn’t appear until you’re actually guiding, but you can toggle this right now to see where it will be.

Next is an icon of arrows looping, and that is just what these do; which is to tell our guide camera to begin continuously capturing images (‘looping’ exposure after exposure). If you see a status text that says ‘Looping’, this is what that is referring to. This does not begin guiding, only a preview of sorts. Additionally once you’ve begun looping exposures, this icon becomes non-functional; stopping the looping or guiding is done separately.

Third down is a circle with a crosshair inside, and this is how you engage calibration/ guiding. This will be greyed out until you’ve begun looping exposures, and additionally can’t be engaged if a mount is not connected. With those two conditions met however, you can tap this to begin guiding.

Provided stars are visible, this will then begin a calibration. If the ASIAIR detects your mount is pointed in a sub-optimal direction for this, it will bring up an alert - at which point you can either abort and slew to a new position within the stated parameters, or move forward at the current position accepting that the calibration may be less accurate/ ideal. When running through a guide session you’ll see some on screen text noting where this is at in the calibration process, and once complete guiding will start!

After the guide start icon you’ll see a hexagon with ‘STOP’ written in. This will be enabled once you’ve began looping/ guiding, after which you can tap this to stop those functions.

Last is the exposure time setting, denoted by an icon labeled ‘EXP’ with the current exposure time value. Tapping this brings up a list of exposure times, and you can just tap the one that corresponds with the value you’d like to set the time at accordingly.

So to bring this all together - to start guiding you’ll first click the guide box to expand it, then select an exposure time to start with. Now tap the icon to begin looping exposures; if you can’t see any stars or if they’re too dim, try increasing your exposure time. If you still can’t see any after maxing out the exposure time, check your focus and check that the camera is working properly by holding a light source in front for one frame to see if the image brightens.

Speaking of checking that camera is working properly, that’s what we want to do with our bench test at this stage. Begin looping exposures, and then place a light in front of the camera (or your hand if you’re in a bright room) and note if the image brightens/ darkens. If it does, your guide camera is all set!

Once you’re done checking the camera or engaging guiding, tap the box with two arrows pointing towards each other in the top left to return to the main screen.

The Left Vertical Bar

Back on the main screen, let’s examine the vertical bar on the left hand side of the screen.

First up is the ‘Hist.’ icon, which will toggle the histogram found at the bottom of the screen on and off. This is for whichever image is currently on screen, and by default will be set to ‘Auto’ stretch the image. You can toggle this off by tapping the ‘Auto’ text, which then will give you sliders on the left and right of the histogram. Simply drag these left and right to set the manual stretch points; to make this easier, tap the ‘Zoom’ text (beneath Auto) to zoom into the region between the two sliders.

Second down from the top is a ‘Guide’ option. This will toggle the guiding feature on and off, though to start guiding you will need to run through the prior guiding section after toggling this on.

Next is the ‘Solve’ icon, and tapping this will begin a plate solve for the image on screen. If you’re not familiar, this process is one in which an image is analyzed to first identify and ‘map out’ stars in an image; with that map then being referenced against a map of all the stars, to pinpoint where exactly your scope is looking in the night sky. The ASIAIR will also use this to detect what focal length your scope is, and set that value accordingly (either filling this in if nothing was set initially, or overwriting what is entered with the calculated value).

After solving you’ll be given some options to either sync the ASIAIR’s model (update where the mount is pointing on the ASIAIR only) or sync the ASIAIR’s model and your mount (update both ASIAIR and mount) to the calculated coordinates; if you don’t want to do either, you can just cancel as well.

After the plate solve feature is the ‘Detect’ feature. Clicking this will again analyze the image on screen, however this time the ASIAIR will be calculating the HFD - or simply put, star size - for the stars on screen. This is helpful as a focusing aid; where you can adjust focus, take an image, see if your stars are bigger or smaller, adjust and repeat until this is where you want it.

Keeping up with the image analyzing features, is the ‘Annotate’ feature. This will complete a plate solve like the earlier dedicated plate solving feature; however instead of giving us sync options this one will instead output annotations on the image. These will highlight celestial objects inside your image, and note what they are to assist with framing or otherwise confirming what you’re currently looking at.

Last is the ‘Cross’ option. Tapping this will display a crosshair and set of circles on screen, which you can then use as a guide for centering a target or whatever else you may want to center or check against the center/ perfect circles.

Now these are all the options for the default Preview mode, which we’ll touch on more in just a bit; but note that you may not see all of these options depending on what mode you’re in. Additionally in some modes or with some accessories connected you’ll see additional options specific to that mode or piece of equipment, which we’ll address in the specific section for each.

These extra features and tools are all well and good, but without an image to use them on they’re not much help; so let’s jump into the right panel, and learn how to take an image!

The Right Vertical Bar

Now while the left vertical bar does change a bit with the mode (and accessories), the right bar is a bit more dynamic to better match the mode you’re in (as we’ve already seen with the guiding feature). This is also where you change the ‘mode’ you’re in (focus mode, video mode, preview mode, etc.); and so in this part of the guide we’ll be covering each mode, and the controls that appear on the right bar in each. To start, let’s cover how to see what mode you’re in and how to switch between them.

At the top of the bar, highlighted in yellow, is the mode you’re in - by default it will be Preview. To change the mode, you just need to tap that text to bring up a list of modes; and then tap which mode you would like to use to switch accordingly.

The Right Vertical Bar Mode - Preview

Since it is the default, let’s start with the Preview mode. This is a general use mode that you can use for focusing, checking what exposure time you may want to use, taking one-off images, checking framing, etc.

The controls here are fairly straight forward; the exposure time is set directly by tapping the ‘EXP’ icon and selecting a time from the list that appears, exactly like with the guide camera setting. If you want to turn on binning you can do this via the ‘BinX’ icon - where ‘X’ will be replaced with the binning mode (1 being off, 2 being 2x2 binning, etc.). Simply tap the icon to change this parameter.

Moving on, in the center of the bar is a circle that once tapped will begin capturing an image - the center circle will change to a square and the outer circle will change to green indicating how much of the exposure has been captured. If you want to cancel capturing an image prior to it completing, just tap the square - otherwise take a look in the bottom right!

In the very bottom right is some text that will change through the different stages of capturing. Most helpful however, is the status bar that shows up here after your image has been taken. Once captured, you’ll see ‘Loading’ along with a progress bar; after this completely fills green and disappears, your new image will display on screen.

The last option in Preview mode is an icon of a square with a down arrow; this is the download button. Tapping this will download a .JPG from the app to your mobile device, and save a .FIT copy to the internal storage - so if the image on screen is something you want to keep, be sure to download it before taking another image.

The Right Vertical Bar Mode - Focus

This mode has similar options to Preview, but as the name suggests this is geared exclusively towards helping you focus!

The binning and exposure time options are still present, but the download button is gone. The differences begin to become more evident now - with the left vertical bar missing some options but gaining a ‘Zoom’ icon, and a green box being present in the middle of the screen. Additionally once the capture circle on the right is tapped, instead of capturing one image and stopping - the ASIAIR will continually capture images until the square icon is tapped.

The way that you use this mode is by first beginning the capture process, and roughly focusing in so that your stars are relatively in focus; then tap and hold the box, and drag it around until it is centered on a star. Once you’ve done that, tap the ‘Zoom’ feature on the left vertical bar.

This will isolate the area inside the green box, and then add some information relating to the star size and peak. Images will continue to be looped at the exposure interval you set, and so - adjust focus, allow things to settle for one or two exposures, assess the change, and repeat until you’re happy with your focus. Then tap the ‘x’ in the top right corner of the focus/ information box to return to the previous screen.

Tap the square button to stop looping images, which will then allow you to select another mode.

A quick note on focusing with a mask - while the Zoom feature isn’t geared towards this method of focusing, the Focus mode is still a useful tool as it is an easy way to ‘loop’ exposures from the main camera without capturing them.

The Right Vertical Bar Mode - PA

PA here stands for ‘ Polar Alignment’, which is what this mode helps you achieve! To use this you will need your mount and main imaging camera connected, your scope focused, and the mount starting at the home or zero position. The camera binning, while displayed may be locked; though you still can adjust the exposure time. Once you’re ready, press the ‘Play’ style button that has taken the place of the capture circle to begin the polar alignment process.

The ASIAIR will go through a series of plate solving and mount movement operations; all you’ll need to do at this point is tap the ‘Next’ button that appears at the bottom of the screen when it appears (ensuring the mount is clear to move first). Once the ASIAIR is finished with its calculations, a ‘Let’s Go’ button will appear. Tap this to move on to the next step.

At that point in time you’ll see a crosshair representing the polar alignment goal, along with a circle somewhere outside of the center point indicating your current pointing. You’ll also see some helpful numerical readouts that show how far off you are currently, along with some arrows to indicate which you need to move your mount; and a face that roughly changes from unhappy/ neutral/ happy as you dial in your alignment.

Begin adjusting your polar alignment with the adjustment knobs or points on your mount. After making a change allow things to settle for one exposure cycle to ensure that the reading isn’t skewed by movement during the image capture. As you adjust your alignment you’ll see your circle move, and you want to adjust in the direction that brings this closer to the center. Once you’ve gotten close enough, this will zoom in to allow you to more finely tune your polar alignment - similarly the farther away you move, the view will zoom out for more coarse corrections. Reference the visual guide and the numerical readouts until you’re happy with your polar alignment - then tap ‘Finish’ to complete!

The Right Vertical Bar Mode - Autorun

Next up is the Autorun mode, and this is likely the mode you’ll find the most useful for imaging sessions - just tell the ASIAIR how many and what type of images you want it to take, start the session, and walk away! To start setting that up you tap the icon directly below the ‘Autorun’ text (looks like three lines with dots next to them), which will bring up a new window.

On the left you’ll be able to set general settings for your autorun plan, such as the name you want to give this plan (tap the current name to edit), ‘Group by Slot’ and meridian flip behavior. Next you can set the initial amount of time you want the ASIAIR to wait before it takes the first image, and then set the Interval value for the amount of time you would like it to wait in between shots. Finally you can set actions to be performed once the autorun sequence has finished, such as shutting the ASIAIR off or sending the mount home.

An important option in this set is the ‘Group by Slot’ setting. The easiest way to explain this may be with an example:

Say we have the following plan: 10 Frames with filter 1, 5 frames with filter 2, and 10 frames with filter 3.

  • With Group by Slot off - the images will be shot one at a time, in order. So the first shot will be with filter 1, the second with filter 2, the third with filter 3, and then wrap back around so the fourth shot is with filter 1 again. After taking 5 frames, the cycle will alternate between filters 1 and 3 since all shots with 2 have been taken.
    So the full sequence would be: 1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,3,1,3,1,3,1,3,1,3
  • With Group by Slot on - the images will be shot in groups: 10 shots with filter 1, then 5 with filter 2, and lastly 10 with filter 3.
    The full sequence here is: 1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3

Moving on to the right will be a grey rectangle with a large plus sign in the center. Tapping this rectangle will bring up a dialog box where you’ll select what type of frame you want (light, bias, dark, flat), the associated settings such as which filter you want this taken with (if you have ZWO wheel connected), exposure time, gain (‘Global Gain’ is whatever the gain is set to in the main camera settings, which we’ll touch on later), how many of these you would like to capture (the Repeat value), and binning.

Tapping the repeat value will bring up a list you can use, but if there is a specific number you would like - tap the square with a slash icon next to the list which will allow you type one in (the exposure also has this). Once you have this set, tap ‘OK’ to add it to your plan.

If you would like to add another set of images to be captured in the same session (to use a different filter or different settings, for example), just tap the grey box to bring up a new dialog box. Once you tap ‘OK’ again, you’ll see the new set added in at the end of the sequence.

To remove an image set, just tap the ‘x’ in the top right corner of that set. You’ll be given a prompt to confirm you want to delete the set, as you can’t undo the action. Additionally if you’ve navigated to this screen after pausing an autorun session - you will need to press the circular arrow in the top right corner to reset all progress in the session, before you can edit the autorun sequence.

Once your plan is all set, go ahead and tap the ‘<’ arrow in the top left to return to the main screen. From here, tap the capture circle to initiate the sequence of captures!

You’ll see some ‘X/Y’ text and a status bar towards the top right, which indicates where the ASIAIR is at in the autorun session; where X is how many frames have been captured, and Y is the total number of frames to be captured. In the bottom right will be text relating to the current operation (delay, shooting, idle while a filter is changed, etc.), and the capture button will show a progress bar for the current frame similar to the preview. You can pause the autorun plan by tapping this, and the resume where you left off by tapping again.

Once your autorun sequence has completed, you can tap the icon below the capture circle to view all your images. These are arranged in folders, with the lights being separated further into folders corresponding to the name you gave the imaging session and all other frames being grouped in with any frames taken on prior imaging sessions.

By tapping on an image you can view and then download or delete it by further tapping the three dots inside a circle icon in the top right. To bulk delete images, just tap the box with a check mark icon in the top right when viewing all images in a folder, tap each image you want to delete, then tap the trash can icon at the bottom of the screen.

Before we move on here, an important note on calibration frames - at this time, the autorun does not pause between groups of shots. This is good for filters, but means that if you set up a plan like this - 10 light frames, 2 dark frames - you only have a short amount of time (whatever your Interval value is) to put the cap on for the darks. Accordingly we recommend taking all lights in one sequence, then setting up another sequence for darks/ bias frames, and then another for flats.

The Right Vertical Bar Mode - Plan

You can think of the plan mode as a sort of expansion of the autorun mode, geared more towards planning a night of imaging in advance. Whereas the autorun mode would run a sequence of images for whatever the scope is currently pointed at, the plan mode will have you set objects to image with an autorun plan for each. You’ll set a time to begin the capture, and once that time comes this will begin setting your mount and imaging in motion to shoot the selected objects.

The plan mode could likely use a guide all its own, and to keep the one you’re currently on moving forward and focused on getting your first shots with the ASIAIR we will not be going into all the complexities of the plan mode. However this mode is at its core a combination of separate features from other parts of the ASIAIR in one place, with some extra steps/ controls; and so once you master everything else in this guide we encourage you to dig in here!

The Right Vertical Bar Mode - Live

The live mode is what you might be familiar with as a ‘live stacking’ tool. If you’re not familiar, basically the idea is this: instead of taking all of your images and then stacking (processing) them later, you perform the stacking process as each frame is taken. The benefit of this is that you get to see your image develop as your imaging session proceeds, and can then just save the one already processed image at the end of your session!

Similar to the autorun mode, the options can be accessed via the icon right underneath the mode text. The ‘EXP’ and binning settings you should be familiar with at this point, and the stacking duration is exactly that - change this value according to how long you want the live stack to run, or set it to ‘No Limit’ if you want the live stack to run until manually stopped.

Next is the ‘Save Every Frame when Stacking’ option. By default the ASIAIR will only integrate each new frame into the stack, not save it, leaving you with one image to download at the end of the session. If however you would like to save the individual frames to also do your own processing later, enable this option.

Now you’ll be presented with a list of types of calibration frames. Tap the text to open the file system; then navigate to the folder your calibration frame(s) are saved in and select them by tapping on each. After you’ve made your selection, tap ‘Select’ in the upper right. Now tap the checkbox next to the frame to add that calibration to the stacking process.

You may have noted that these calibration frames are also options you can select at the top of the options menu. Selecting these will change the options available to just exposure time, binning mode, and the number of calibration frames to be captured rather than a duration. The idea is that you can run a live stack of calibration frames which will then create a ‘master’ frame that you would then select when setting up the light frame live stack, through the process referenced above.

Once you have your settings dialed in, tap ‘OK’. From here beginning your live stack will follow the same convention as the prior modes - just tap the capture circle, and tap it again to stop the image capture at any point.

As more and more frames are captured, you’ll see more and more detail appear in the image on screen. When the duration set is reached, or when you tap the stop button, you can then download the image with the icon at the bottom (the square with a downwards facing arrow). Once that is done, or whenever you would like to delete the on screen image, tap the paint brush icon (this will ask you to confirm the action, so no need to worry about accidentally hitting this!).

The Right Vertical Bar Mode - Video

The last mode in the list is the video mode. This is what you would want to use for planetary imaging, and the options available have been laid out for that accordingly!

Before we touch on the right vertical bar options, note that on the left vertical bar is a new option called ‘ROI’. This sets your ‘Region of Interest’, or the portion of the sensor you would like to use. The smaller the ROI value, the smaller section of the sensor you’ll be using; which can be helpful to sometimes (depending on your exposure time setting) increase your Frames Per Second (FPS), and reliably keeps video sizes small(er).

Back on the right vertical bar we’re again met with a familiar layout: the mode, the settings icon, and the capture circle (though this time it is red instead of white). Opening the settings you’ll see the familiar binning mode selector, and then a handful of new settings. These are mostly self-explanatory; but the ones you want to focus on are the video format and the exposure settings.

The video format setting has three options: MP4, AVI, or both MP4 and AVI. This will dictate what format your video is captured in. MP4 will generate a smaller, lossy, file which can be downloaded to your mobile device (if storage permissions have been granted for the app). AVI will create a larger, but lossless, file that needs to be stored on the ASIAIR and retrieved later. In simpler terms, MP4 video is to AVI what a JPEG image is to a RAW image; set this to whichever best suits your particular needs.

The EXP setting here is a bit different than what we’ve seen in all other modes - instead of giving a list of values, or a box to enter one, you’ll be presented with two options. The exposure will be set elsewhere in this mode, and these options are for the scale that the exposure will be in - ‘µs’ for microseconds (0.000001 sec) and ‘ms’ for milliseconds (0.001 sec). These do not overlap, so if for example 1ms (the minimum ms value) is still too bright you would switch to µs to continue adjusting the exposure time down; and vice versa if the max value of 990 µs isn’t bright enough.

After setting up the video mode how you want, tap ‘Save’ to return to the main video screen. Now tap the arrow just below the capture circle icon. This will expand the gain and exposure length control window to the left, which in this mode is adjusted by sliding the ‘scale’ up and down. Simply tap the parameter you want to adjust, tap and hold the scale, and slide it up or down. You’ll see the numerical value changing underneath the parameter selected, and additionally an on-screen preview will adjust in real-time with this. Set these to the values that work for you, and then tap the arrow again to collapse the gain and exposure setting window.

From here it is just like the prior modes - start the capture by tapping the capture circle, and stop it by tapping again. If you have MP4 selected, after stopping the video capture the ASIAIR app will try to save to your mobile device (if you haven’t enabled permissions it will display a dialog box prompting you to allow them); if you have AVI selected this will just save to the ASIAIR’s internal storage. To view video files save on your ASIAIR, tap the box with a play button in it at the bottom of the bar to open the video file folder where these will be stored.

The Right Vertical Bar - Wrap Up

And that is all the different capture modes (currently available) on the ASIAIR! Circling back to our bench testing of the ASIAIR, at this stage what you’ll want to do is:

  • In a bright environment, open the Preview mode.
  • Set the exposure to about 30 seconds.
  • With the scope or camera covered, take an image.
  • Uncover, and then take another image.

All you’re really looking for here is a change in brightness between the two to determine whether the camera is ‘seeing’ light and if there are any issues capturing/ sending images to the ASIAIR app. If everything checks out, you’re one step closer to completing the bench test!

Mount Control

Next to the right vertical bar is where you’ll find the mount control panel; which can be hidden and unhidden by tapping the arrow that shows up just to the left of it. This panel will allow you to manually slew the mount, enable mount tracking, and do a basic GoTo.

Let’s start with manual slewing. This is pretty straight forward, you tap and hold the direction you would like to slew the mount until you’ve reached the desired position. The speed can be adjusted by tapping the ‘Speed’ button just above the arrows, and then tapping, holding, and then sliding up and down on the bar that appears until you have your desired speed.

To engage mount tracking (not guiding) is even easier - just tap the button labeled ‘Tracking’ to toggle the tracking on and off. You’ll see a little colored dot on this button, and this shows whether tracking is on or off; with orange indicating tracking is off, and green that it is on.

To issue a GoTo command from this panel, tap the magnifying glass icon inside the box above the speed and tracking buttons. This will bring you to a new screen, where celestial objects from the last catalog you had used will be displayed - for instance if you previously had selected M81, this will open to the Messier catalog. Each entry will have a small image of the object next to it (if one is available), along with some information on its location/ size/ magnitude; along with a graph showing when the object will be above the horizon at your location, to assist with planning and selection.

To change catalogs, tap the three line icon in the top right corner (same icon used for the settings in some of the modes we went over previously). This will bring up a list of catalogs/ lists for you to choose from, along with something called ‘Tonight’s Best’ (this is also the default starting list). The Tonight’s Best list is a bit different from the others in that it isn’t as static; rather this will attempt to show you a collection of objects well suited for the date and location you’re at.

If you know the name of, or the catalog number for, an object you can additionally search that by tapping the magnifying glass next to the catalog selection icon and then typing that in. Results in the ASIAIR database will be displayed below, and after tapping enter to search you can select one of these.

A quick note about named objects - at this point in time, not all of these are searchable by their name. If the object isn’t coming up, you may need to use its catalog number instead.

Once you’ve found the object that you’d like to slew to, tap the entry and then tap the GoTo icon that appears in the bottom right of the screen (circle with a crosshair icon). So long as the object in question is above the horizon, your mount will slew to the target accordingly - if the object is below the horizon however, the app will give you an error stating this and refuse to move (in which case you’ll need to select a different object).

After the mount has slewed to the coordinates, the ASIAIR will verify that the object is centered by taking an image and plate solving it; adjusting if necessary. If you’re running into a situation where it can not plate solve - for instance if the scope’s view is obstructed, you still have the lens cap on, you’re bench testing this during the day, etc. - then you can just hit stop at the verifying stage to bypass that check. Additionally there is a setting to turn the verification off entirely, which we’ll cover later in the mount settings section.

That’s all there is to it! For the last step of the bench testing, you’ll want to make sure the mount can slew in both directions on both the RA and DEC; you’ll probably want to set the speed high so the movement is visible, and make sure there is a payload on the mount as well as checking it is roughly balanced first.

This now completes the rough bench checks you can do during the day, and that you want to do before getting everything connected. If you ran into any issues, we will be touching on the settings sections soon where you can check the connections.


The last feature to go over on the main screen is the planetarium built into the ASIAIR. This is a powerful tool to help you select and frame targets, and you can access this by tapping the picture of the Big Dipper constellation in the bottom right of the screen. You’ll be greeted with a simulated view of the sky for the current date/time/ location, which should be centered around where your mount is currently pointing - if you complete a plate solve and sync prior to opening this, the rotation of your camera will be matched as well.

The default zoom will be fairly tight on your current pointing/ framing, but you can zoom in and out with pinching gestures just like what you would use to zoom in/ out on an image. To move your view around, simply tap, hold, and drag. As you move you’ll see two boxes - one blue and one red. The blue box represents your current pointing and framing, and the red indicates what your pointing/ framing will be synced to once the GoTo command is issued.

Planetarium - GoTo

That is done via tapping the box with a crosshair icon in the bottom right, appropriately labeled ‘GoTo’. You’ll begin to see the blue box moving as the scope does, until the red and blue boxes are overlaid on top of each other. Next you’ll see some dialog indicating a plate solve is occurring in the bottom left (next to ‘Ground’) - this is the ASIAIR double checking to ensure that the mount and framing actually matches what you’ve asked for. You may see the blue box shift a bit after the solve completes and then move back to overlaying the red box; this is the ASIAIR making adjustments, and after each of these you will need to wait as it does another plate solve. This can be turned off with a setting in the mount settings tab (the same one as for the basic GoTo, which again will be covered later).

You’ll be locked out of making further adjustments until the ASIAIR has completed all movements, solves and readjustments, or until the GoTo is manually stopped - the option for the latter will replace the GoTo icon, and just a tap will cancel the GoTo.

Planetarium - Object Selection

That’s simple enough but you’ll need something to GoTo first, so let’s circle back to that for a moment. Dragging your view around, you’ll notice that the box containing the GoTo icon changes the celestial object listed to reflect a major object that is currently within your red box (though note most of these will be listed with their catalog number, not their common name).

How much detail you see on an object will generally depend on how far zoomed in or out you are; for instance when zoomed out so that you can see the entirety of the Andromeda constellation, the Andromeda galaxy will not be visible. However where it sits will be marked by an oval, and this is notation of sorts that you’ll see across the planetarium - where notable objects that are not visible at the current zoom, but will be once zoomed in, are outlined with a blue perimeter. The perimeters themselves are also zoom dependent; this is all to say, pick a section of the sky you’re interested in and play with different zoom levels!

If you’re not interested in hunting for an object however and just want to use the planetarium to dial in your framing/ get an idea of what the target will look like with your setup, you can also search via the magnifying glass icon (labeled ‘Objects’) towards the bottom left. This functions almost just like the search and catalog feature in the mount control panel, except in addition to GoTo you’ll have an extra option to ‘Center’ (circle with a large crosshair icon). The center option will move the red box and your view so that it is centered on the selected object, but without performing a GoTo.

Planetarium - Frame Rotation

So say you’ve selected your object and completed the GoTo, but your frame isn’t rotated quite how you’d like. If you have a camera rotator in your optical train (manual or electronic) you’re in luck, as ZWO has added this tool to help you easily dial rotation in!

Engaging this feature will bring up a sliding scale on the right, and tapping and dragging up and down will adjust the red box’s rotation. Once the red box is rotated where you would like, tap the ‘Auto’ text next to the scale. Now begin to rotate your camera, leaving time between movements for the ASIAIR to complete a solve and update your current rotation. Once you’re lined up, tap the frame icon again to turn off the alignment tool.

Tabs/ Settings

Tapping each of the icons along the top will bring up a menu full of options relating to that corresponding component. These can range from basic (camera gain) to advanced (connecting your ASIAIR to your home network). If you encountered an issue at any stage of the bench tests, this is where you’ll want to go for troubleshooting.

At this point in the guide you should be familiar enough with navigating the ASIAIR’s interface and changing settings, and with so many to go through here we are going to be changing the style up a bit.

Tab 1 - ASIAIR

  • Wi-Fi
    Frequency - This determines which frequency the ASIAIR hotspot will use. 2.4 GHz is slower but has more range, 5 GHz is faster at the expense of range. One note about 2.4 GHz is that it is the most common and so you may encounter a situation where there are a lot of devices or access points using this at your location, causing interference; so it may be worth trying both.
    Name - The name the ASIAIR will broadcast its hotspot under. You will need to reconnect your mobile device after changing.
    Password - The password protection for the ASIAIR’s hotspot. If you change this, you will need to reconnect your device.v
    Station Mode - This is where you would configure a connection between the ASIAIR and your home network. We will not be covering this here, but this is where you would start if you want to control the ASIAIR while remaining connected to the home network.
  • Power - Here you’ll see a box with some information on the ASIAIR system’s current status. Below this are the 12V power outputs, whether they’re on or off, and what voltage they’re outputting if toggled on. Tap the box to name the output, and tap the toggle next to the name box to turn the output on and off.
  • Personalize Settings - This will allow you set the ‘beep’ volume, like the one the device emits when the WiFi hotspot is started up; and your preference for temperature units.
  • Switch Device - This allows you to switch ASIAIR’s if you’re using multiple units.
  • Restart - Restarts the ASIAIR.
  • Shutdown - Powers off the ASIAIR via software. It may be obvious, but this is just a software switch; the physical switch will remain in the ON position. To turn the device back on after a software shutdown, you’ll either need to disconnect/ reconnect power or toggle the switch OFF and then back ON.

Tab 2 - Main Camera

  • Main Camera - This is where you select the connected camera you’d like to use for imaging. While a camera is connected you can not change this setting; the connection is toggled on/ off via the slider to the right. If your camera is not listed here, the ASIAIR can’t ‘see’ it. Additionally, you can’t select a camera already assigned elsewhere; you’ll first need to set both the Main and Guide cameras to ‘None’ and then make the correct selection, in the event these are incorrectly assigned.
  • Gain - Directly next to this is your current gain value.
    L, M, H - Selecting one of these will apply a preset Low, Medium, or High gain value.
    Bottom Slider - Slide this around to select a custom gain value.
  • Main Scope Focal Length - This is where you can edit the focal length of the scope. Note that after you complete a plate solve, the ASIAIR will change this to whatever value it calculates; though it is still worth setting if you’re changing scopes or have yet to complete a plate solve.
  • Cooler - The toggle to the right of this will turn cooling on/ off. The value selected here is the target temperature. Accordingly you’ll need to be mindful of what your camera’s starting temperature (noted in the bottom left of the main screen, you’ll want the value before cooling is enabled) is and what the camera is rated for; ZWO rates their cameras in terms of how much cooling below ambient (starting) temperature they can provide, not how cold they can get. Like the gain setting above, there will be helpful preset values along with a slider for selecting a custom value if desired.
  • Anti-dew Heater - If your camera has an anti-dew feature built-in, you can enable it here.
  • Customize File Name - This menu allows you to enable/ disable the addition of the camera model, gain value, and temperature reading to the file names of images captured.
  • Advanced Settings - Here you can toggle some additional settings such as a continuous capture (looping) in Preview mode, and whether you would like camera cooling to begin upon connection or only when manually toggled.

Tab 3 - Guide

  • Guide Camera - Exactly the same as the Main Camera selection box in the prior tab; toggle on the right to connect/ disconnect the camera, and a list to select the camera from. The same constraint of being unable to select a camera already assigned to another role (Main Camera) applies.
  • Gain - This functions exactly the same as the gain controls in the Main Camera tab; set your desired guide camera gain here.
  • Guide Scope Focal Length - This is where you can set/ edit your guide scope focal length value; which it is more critical to do, as unlike the main scope value the ASIAIR will not calculate or correct this.
  • Calibration Step, Max DEC Duration, and Max RA Duration - These values relate to the duration of guide pulses that the ASIAIR will send to your mount when guiding is in use; specifically the maximum duration a guide pulse can be for calibrating, guiding the DEC, and guiding the RA.
  • Auto-Restore Calibration - Instead of recalibrating the guiding tool every time, you can turn this on to reuse prior calibrations. Note doing so may result in less accurate guiding.
  • Guide Camera Bin2 - Toggle this to set your guide camera from BIN 1 (no binning) to BIN 2.
  • Stability - This will allow you to adjust some more advanced settings for guiding, such as stability, settling time, and the maximum wait time for dithering operations.
  • Dark Library - In this submenu you can create and apply a dark ‘library’ (calibration data, essentially) for your guide camera.
  • Dither - As the name indicates, this is the submenu for enabling dithering as well as adjusting the parameters for that operation.

Tab 4 - Mount

  • Mount - This list is where you will select your mount, or ST4 control if you’ll be using the ST4 connection between your guide camera and mount (note this will limit how much of the following is visible). As with the two camera selection options, the toggle connect/ disconnect is to the right of this box. Upon first use or first connection, you may find that this is off or needs to be cycled on and off prior to a connection being established.
    Baud - This sets the baud rate, and if your mount selection above is correct but you’re still having issues - you may need to look up and set the correct value for your mount.
  • View Objects - This opens the GoTo menu/ feature, the same one that you access from the mount control panel on the main screen.
  • Mount Info - This will show you the time, date, location and pointing your mount is currently reporting back to the ASIAIR. You can not edit these values here.
  • Location Info - This is the location pulled or set by your mobile device. You can overwrite the location on the mount by tapping the ‘Sync to Mount’ button (you may need to switch to another tab and back before this is reflected in Mount Info). You can also tap each field to manually enter/ change the location if so desired.
  • GoTo Auto-Center - As we’ve covered, the ASIAIR will run a plate solve after a GoTo command has been issued and adjust if the actual pointing doesn’t match what was requested. If you would like to turn off the plate solve/ adjustment feature, toggle this off; if you want the feature on, this is where you would adjust the exposure time settings for the plate solve frame captured.
  • Meridian Flip Settings - This submenu will allow you to adjust the flip behavior for the Autorun and Plan modes.
  • Guiding Speed - Sets the rate for guiding.
  • Tracking - This toggles on mount tracking, just like the button in mount control panel on the main screen; though here you can additionally adjust the tracking rate if desired.
  • Go Home - Returns the mount to the home or zero position.

Tab 5 - EFW

  • EFW - Following the trend of the past couple of tabs, this is where you select and toggle on/ off your filter wheel.
  • Position - Rotates the filter wheel to the selected filter from the list. This will reference the names assigned in the next menu.
  • Filters - This will open a sub menu for setting up your filter wheel. You’ll see a number of rows, with each corresponding to a filter wheel slot.
    Name - Here you can either select from some preset labels (such as ‘L’,’R’,’G’,’B’, etc.), toggle the slot off (by selecting ‘None’), or set a custom name (tap the icon next to the box).
    AF EXP - If you are using an EAF, you can set the exposure time used when auto-focusing with the filter.
  • Rotate in One-Way - Toggle this on if you only want the filter wheel carousel to only ever move in one direction.
  • Recalibrate EFW - If for some reason your filter wheel is not lining up the positions properly, you would want to use this tool.

Tab 6 - EAF

Connecting an electronic focuser through this menu will add an additional option to your left vertical bar in some shooting modes. This is denoted with a new icon labeled ‘Focuser’ which we will cover here briefly.

Simply tapping the new icon will bring up a panel where you can select either ‘Slow’ or ‘Fast’ movement (tap the text to switch between the two), and then two arrows to move focus in or out. Simply tap and hold the direction you want to move to engage the focus motor accordingly.

Below those will be an ‘AF’ icon. This will open up a new window for the autofocus mode. Follow the on-screen instructions; essentially this will entail getting your focus close and then turning on the auto-focus feature which will dial focus in further.

In addition to the extra tool in the left vertical bar, this autofocus feature can run automatically at various other points; for example after a filter change, as seen in the electronic filter wheel section above.

  • EAF - Keeping with tradition, this is where you select and connect to the EAF.
  • Auto Focus
    AF EXP - Set the exposure time for the frames the auto-focus tool will capture and analyze. If you have a filter wheel connected this will be disabled, and this value set in the EFW tab.
    Step size - This value is how much the EAF will move for each autofocus check/ adjustment. The smaller this value, the finer the EAF can dial in the star size - just keep in mind that also means it will be doing more checks, which means a longer auto-focus process.
    X°C Change - Toggle this on to have the ASIAIR run the auto-focus tool every time the temperature changes by selected value.
    Every X Hour(s) - Toggling this on will allow you to select an interval that the auto-focus will be run after.
    After Filter Change - Turning this on will run the auto-focus after each filter change.
    Before Each Target Start - Turning this on will run the auto-focus before each target, such as in the Plan shooting mode where multiple objects may be scheduled.
    After Auto Meridian Flipped - Toggle to run the auto-focus after a meridian flip.
  • Current Position - This will show the current position. Tapping the box will allow you to change this value; generally you’d only do this to set the 0 position.
  • Go To - This allows you to send the EAF to a custom position. Tap the box, enter the desired value, and then tap ‘Move’.
  • Reverse - Focusers don’t all move the same way to achieve the same task; if you find that your EAF is moving your focuser the opposite direction, you’ll need to toggle this on to reverse the EAF’s motor movements.
  • Beep - Toggle this on if you want the EAF to give auditory feedback. When on, the EAF will beep once for a successful move or twice for an error (usually meaning you need to check your 0 position and motor direction settings).
  • Step Setting
    Slow - How much you want the EAF to move on the ‘Slow’ setting.
    Coarse - How much you want the EAF to move on the ‘Fast’ setting.
    Limit - The maximum amount of movement the EAF should have. To find this, start from your 0 position and rack focus out with the ‘Focuser’ tool panel. Once you see the end of travel has been reached, open the EAF tab and note the ‘Current Position’ value. This is your Limit value.
    Backlash - Set a backlash compensation value.

Tab 7 - Files

  • Storage - Here you will see ‘eMMC’ along with a bar. This bar is color coded to give you an easy ‘at-a-glance’ reference for how much free space is left and what is using space currently. Note that a portion will be taken up by the ASIAIR OS; these are the core system files, and hence that portion of space can’t be freed up. To clear out all the images taken on the eMMC (or connected USB drive), select that storage medium and then tap the ‘Clear’ option in the upper right.
    USB Drive - The ASIAIR can save to, and transfer internally store images to, an external USB drive. If this is something you’re interested in, note the max capacity your ASIAIR will support; the ASIAIR Plus for example can support up to 1 TB, with 512 GB being recommended. You also want to stick to “thumb drive” or “USB stick” style drives, spinning platter HDD or SSD drives might work but the aforementioned type seems to be the most reliable. To select the USB drive as the storage destination, tap the USB entry under eMMC (and vice versa to switch back). If you want to remove the USB drive while the ASIAIR is still on, first tap the arrow icon on the far right and tap ‘Eject’ in the dialog box that shows up.
  • Image Management - This opens up the file manager that you may have seen prior when selecting calibration frames for the Live Stack mode. Here you can view and transfer/copy your images (if you have an external drive connected). To copy, navigate to where the folder or files are that you want to copy, tap the box with a checkmark icon in the upper right, tap all the folders/ files you’re interested in, and then use one of the options down at the bottom.
  • Capture Logs - Logs from Autorun and Plan sessions will be stored here.
  • Post Stacking - The ASIAIR has a small built-in post processing suite where your images or videos can be processed right on the device. We’re not going to cover post processing with these, but to get started with them, tap the type of object you want to process which will open the associated window.

Tab 8 - About

At the top you’ll see the ASIAIR logo, with the model name for your device next to it. Underneath will be the version of the app, and the firmware version.

  • Experimental Features - This section will have features that are still in the testing phase that you can try out. Just note these are pre-release features; which means they may introduce bugs or issues, and you should take caution accordingly.
  • Reset Firmware - If you’re ever directed to reset the firmware on your device, this is where you would go through that process. Tapping here will bring you to a separate window with information regarding this.

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This Article was Last Updated on 07/18/2023