ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025)
Quickly Adapt Your APS-C View!
Quickly and easily change up your dedicated astronomy camera's view into the night sky with the ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025)! Enhanced light leak protection, high capacity, and excellent compatibility combine in this iteration of the renowned ZWO EFW line. Give your astrophotography rig a seven filter speed dial, with this 36mm filter wheel offering!
Whether your system runs on monochrome or one-shot-color, the expansive astrophotography filter landscape has something for you! If you're looking to build out an APS-C imaging system, this filter wheel allows you to load up seven 36 mm unmounted filters for a more compact and value oriented system compared to the full-frame coverage 2" options. Be ready for a wide variety of perspectives with a color camera, or hold both LRGB and SHO filter sets for your mono imaging option, all with the ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025)! This model pushes the previous generation forward, with improved light leak protection and high performance stepper motor. Rotating any of the seven filters into frame is easy, with ZWO's renowned compatibility making integration with your PC or ASIAir simple.
Direct ZWO Camera and Pro Camera Integration
The ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025) is designed to integrate seamlessly with ZWO's Pro cameras and 'puck' style cameras, either as a standalone accessory or in conjunction with the ZWO OAG-L. The filter wheel accomplishes this via passthrough holes on both front and back covers that allow cameras and the OAG-L to be screwed directly to these components. For those looking to add a filter wheel without the OAG-L, an M54 external to M48 internal threading adapter is included which connects the front cover with the 16.5mm spacer included with most ZWO Pro cameras for an imaging train set at the industry standard 55mm of backfocus. The filter wheel additionally features M54 threading on the rear cover, which provides the flexibility to create imaging trains without a direct camera connection!
Pivot Your Perspective with Ease!
The ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025) brings you simple control of seven filters for a simpler, more streamlined, and automation-ready astrophotography system!
Fast, Precise Filter Access
The ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025) allows you to
effortlessly swap seven filters into place without any disassembly in the
field or hands-on access required. The internal seven position carousel
accepts 36 mm unmounted filters between 1.9-3.5 mm thick, with solid
retention to keep your filters firmly in place. This is driven by a high
quality stepper motor for precise motion, long service life, and fast filter
changes. The seven filter capacity is perfect for expansive filter
collections, capable of carrying both the popular LRGB and SHO filter sets!
The 36 mm filter size is well suited for APS-C dedicated astro cameras,
bridging the gap between the common 1.25" (too small) and 2" (more coverage
than required) size filters.
Stray Light Shield
With this generation of ZWO filter wheel comes added light leak protections
to turn your filter wheel into a stray light stronghold! The redesigned
housing closure now features a slot-style closure and sealed motor
compartment to eliminate the possibility of light slipping through a small
gap in the two sections. To prevent light sneaking by in a bolt-through
configuration, new light blocking pads replace the masks for easier
installation and a light-tight seal!
Convenient Control
Controlling this filter wheel once installed is easy, with ZWO's renowned
compatibility bringing control to the vast majority of systems in use today!
Connecting the ZWO EFW 7-Position Filter Wheel for 36mm Filters (2025) to
your system is a USB type C port for easy setup even in darker environments
thanks to its reversible nature. Native support through ZWO's ASIAir system
and ASCOM compatibility makes this quick to integrate and easy to control
with today's most popular devices and astrophotography software suites.
Included Accessories
Included with the ZWO EFW
7-Position Filter Wheel for 36mm Filters (2025) is a host of accessories
that will help get your system up and running right out of the box! For
imaging train connections, an M48 to M54 step-up ring, M54M-M42F adapter,
and M54M-M48F adapter are included; with 0.5 M and 2 M USB A to USB C cables
included for power and data. Two sets of screws, 6x M2.5-6, 26x M2-4, and
one 10x filter mask set are included for bolt-through camera connections and
unmounted filter installation. To additionally make assembly easy right out
of the box, a Philips head screwdriver has been included.
| ZWO EFW Specifications | |
|---|---|
| Filter Slots: | 7 |
| Filter Sizes Supported: | 36 mm unmounted filters |
| Filter Thickness Supported: | Unmounted filters 1.9-3.5 mm thick |
| Back Spacing Added By Filter Wheel: | 20mm |
| Front Connection: | M54, ZWO OAG-L direct connection holes |
| Rear Connection: | M54, ZWO camera direct connection holes |
| External Power Required? | No |
| Data Interface: | USB-C |
| Weight: | 515g |
Astronomy Hub: Your one-stop-shop for Astrophotography Knowledge!
Our Gear Experts have compiled a wealth of information to help expand your astrophotography knowledge! Below you’ll find links to articles, videos and "how-to" guides. Just one more reason that our Astronomy Hub is a one-stop-shop for all your astronomy and astrophotography needs!
| Combining Narrowband Data in Pixinsight |
| ZWO ASIAir Ultimate Guide |
