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Apertura 12" AD Dobsonian Telescope - AD12

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SKU: APT-AD12
$899.95 $879.95
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Apertura AD12 - 12" Dobsonian Telescope
With Lots of Accessories!

AstroBackYard recently named the Apertura AD Dobsonian Telescope the Best Telescope for Beginners! Check out their Review of these fantastic Dobs here!

You'll be ready to observe the Universe right out of the box with the amazing 12" Apertura Dobsonian telescope! The AD12 package includes everything you'll need to get started, including a full-sized right-angle (RA) image correct 8x50 finder scope, two eyepieces, a laser collimator, cooling fan, and more. With 12" of aperture, this huge light-bucket is capable of delving into the deepest reaches of space to capture thousands of celestial objects. Everything from huge galaxies, nebulae and star clusters to smaller planetary nebulae, double stars, and millions of suns in the far off regions of space will be within the grasp of your telescope. On a steady night of viewing, you can explore the equatorial belts around Jupiter, spy Cassini's Division in Saturn's rings, or study the polar ice caps and dusky maria on the surface of Mars.

Accessories Included with the 12" Apertura Dobsonian
Over $200 Worth of Free Accessories!

We have carefully compiled all of the premium accessories you need and more so you can enjoy every observation with the Apertura 12" Dobsonian. With your purchase, you will receive over $200 worth of accessories for FREE, including:

  • Primary Mirror Cooling Fan - Achieves ambient temperture for your telescope quickly and efficiently.
  • Laser Collimator with Battery - Offers effortless collimation to ensure your optics stay in alignment.
  • 2" Crayford-style Dual Speed Micro 10:1 Focuser - Highly-accurate focuser offering smooth movements and precise focusing on celestial objects.
  • 1.25" Adapter for Focuser - Allows you to use 2" and 1.25" eyepieces, filters, and accessories for added versatility.
  • 9mm Super Plossl Eyepiece - 1.25" - Provides medium to high magnification views and fully-multicoated optics.
  • 30mm Super View Eyepiece - 2" - Offers a 68° field of view and exceptional light transmission.
  • 8x50 Right Angle Correct Image Finder and Bracket - Easily locate celestial objects from a comfortable position.
  • 35mm Extension Tube - Delivers an extra 35mm of focal travel to bring your scope into focus.
  • 1.25" Moon Filter - This neutral density filter reduces glare and ghosting for exceptional views of the Moon.
  • 4-Slot Eyepiece Tray - Keeps all of your eyepieces within reach so you can easily switch between eyepieces.

Add everything together, and you receive over $200 worth of accessories included for free with the AD12! No other 12" Dobsonian out there comes packed with this many accessories at no extra charge!

Apertura AD12 Dobsonian Highlights...

  • The giant 12" parabolic mirror on the AD12 is made from quality materials and is figured to 1/12th wave. It is finished off with an aluminum and silicon dioxide coating that offers 93% reflectivity to ensure stunningly bright images.
  • The AD12 optical tube assembly is made from steel for durability and beauty and is fitted with a 2" dual speed 10:1 Crayford-style focuser for smooth, easy focusing. A 2" to 1.25" adapter is included so you can use both 1.25" and 2" eyepieces and accessories, and we even include a 35mm Extension Tube to extend the focus range required for some eyepieces.
  • The mirror sits at the end of the OTA in an adjustable mirror cell. When it comes time to make adjustments to your mirror for precise alignment, use the include Laser Collimator and then tweak the mirror's position in the cell with the hand-adjustable knobs. No tools are needed except your hands!
  • A battery-operated cooling fan is attached to the back side of the mirror cell to help your telescope reach ambient temperature quickly and efficiently. The fan runs on eight (8) AA batteries that are provided by the customer.
  • The telescope's base, aka rocker box, is what differentiates a Dobsonian from other Newtonian telescopes. The Apertura AD12 tube assembly sits on the base with ease, and then the telescope can be manually moved up, down or to either side.
  • To easily move the AD12 up and down but help it to stay in the desired position, the telescope tension can be adjusted to match the weight of accessories on the tube assembly. To use this system, just turn the large aluminum knobs on either side of the telescope to tighten or loosen the tension until everything balances perfectly. Easy and fast!
  • The bottom of the Apertura Dobsonian telescope's base is styled like a "Lazy Susan". An azimuth roller bearing provides dozens of support points for smooth, 360º motion, and sealed ball bearings keep movements in altitude easy and smooth as well.
  • Accessories include a right angle, image-correct (RAIC) 8x50 finderscope to assist you in locating objects, a 2" 30mm Super View eyepiece, a 1.25" 9mm Plossl eyepiece, a 2" to 1.25" adapter and a 35mm Extension Tube for the telescope's amazing focuser, a laser collimator (which is almost never included with a telescope), a 1.25" Moon filter, a 4-hole eyepiece tray, and a snap-in dust cover.

How to Set Up & Use the AD12 Dobsonian

Please Note: A physical copy of the instruction manual is NOT included with this Dobsonian, however you are welcome to download a PDF of the Apertura AD Dobsonian Manual any time you like. Thanks.

A Dobsonian telescope with accessories is perfect for beginners as well as advanced amateur astronomers. Unlike computerized telescopes, a classic Dobsonian does not find objects for you. You do that yourself. It may be a challenge at times, but you will have the honor of learning the night sky. To set the Apertura Dobsonian up for a night of viewing, just put the rocker box on fairly level ground, set the optical tube in the cradle, slide the finder scope on, put an eyepiece in the focuser, and start observing. There are no motors or electronics to deal with, and you won't hear anything except the hum of the fan during cool down. To move the telescope, push or rotate it in the direction you wish to go, and use the 8X50 finderscope to help you center the object in your field of view.

This telescope with accessories has a unique design that allows for easier balancing of the telescope in altitude. A two piece CNC machined aluminum side bearing holds the weight of the telescope OTA, and when you need to make tension adjustments, say because you added a heavier eyepiece or other accessory, all you need to do is turn the knurled knob (there’s one on each side of the rocker box). With a little bit of experimentation, you’ll find the perfect balance for your Apertura AD12 Dobsonian!

We recommend a planisphere for your latitude to help you get your bearings and find brighter objects, as well as a more extensive star chart of some kind to help you locate fainter objects. There are several inexpensive (or free) programs and/or websites available that allow you to print out a nightly star chart for your location and observing date and time.

Apertura AD12 Dobsonian Specifications

  • Primary Mirror Diameter: 12"
  • Primary Mirror Details: Thickness 1.48", Parabolic, 1/12 wave
  • Primary Mirror Coating: Aluminum and silicone dioxide (SiO2); Reflectivity = 93%
  • Secondary Mirror Details: Minor Axis 2.76", Major Axis 3.86", Thickness .47"
  • Secondary Mirror Coating: Aluminum and silicone dioxide (SiO2); reflectivity = 93%
  • Optical Design: Newtonian Reflector
  • Mount Design: Dobsonian, clutch mounting with tension knobs
  • Focal Length: 1520mm
  • Focal Ratio: f/5
  • Limiting Stellar Magnitude: 14.9
  • Focuser: 2 inch, dual speed Micro 10:1 Crayford style
  • Eyepiece 1: 2", Superview 30mm, 68 Degree FOV, 22mm Eye Relief
  • Eyepiece 2: 1.25", Super-Plossl 9mm, 52 Degree FOV, 6mm Eye Relief
  • Finderscope: Right-Angle, Correct-Image 8 x 50 viewer
  • Optical Tube Length: 57.38"
  • Base Height: 27.5"
  • Base Diameter: 24.88"
  • Fully Assembled Height: 63.75"
  • Optical Tube Assembly Weight: 47.8 lb.
  • Base Weight: 38.3 lb.
  • Fully Assembled Weight: 86.1 lb.
  • Warranty: 1 year for materials and workmanship

This Product Comes with the Apertura Absolute Warranty!

  • Two-Year Warranty against product defects.
  • Three-Year Accident Replacement Program that begins after your initial 2 year warranty expires.
  • Your Apertura Absolute Warranty is transferable.

Download a copy of the Apertura Absolute Warranty for more information on this program, how to make a claim, and why it is important to keep your original receipt and the product's original boxes & packaging!