Telescope Optical Tube Assemblies - OTA

An affordable and flexible design for any astrophotographer or visual astronomer. The Askar 103APO allows for multiple use cases at an affordable price!

This is an incredible widefield astrograph. Well worth a look if you want to get the Horsehead and Flame in the same field of view, or if you're out to image clusters of galaxies.

Have you every wanted to easily change your focal distance to meet your imaging needs? Now you can with the worlds first exchangable astrograph system. Easily swap between apertures, focal lengths, and reducers to suit...

The SkyWatcher Evolux astrographs are super light, super portable apochromatic imaging scopes. They'll help deliver beautiful wide-field images of deep-sky objects like nebulae and galaxies.

An aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view.

The Askar FRA400 is a fantastic astrograph, these are nice wide scopes that deliver nice flat images without a flattener. This size is super versatile and delivers amazing results.

The wildly popular RedCat has earned it's place as a legendary astrograph. These use premium glass to deliver accurate color, a flat image, and a wide field. They're great little scopes, perfect for imaging massive...

This one's a shop favorite. We have a soft spot for high quality, high value refractors. This 3" astrograph hits the sweet spot for wide field of view and portability. This is a great astrograph...

This refractor uses premium glass and excellent optical design to deliver a high quality astrograph. These are incredibly fast and wide, it's sure to impress even the most discerning astrophotographer.

The Orion ShortTube 80 Refractor Telescope Optical Tube Assembly is ideal for use as a dedicated guide scope for guided astrophotography pursuits. The fast f/5 achromatic optics provide a wide field of view that makes...

Premium apochromatic refractors are something special. You'll get stunning views and mind-blowing images out of this superb triplet refractor. The Sky-Watcher Esprit uses world class glass and optical design to ensure clear, high quality views.

The SkyWatcher Evolux astrographs are super light, super portable apochromatic imaging scopes. They'll help deliver beautiful wide-field images of deep-sky objects like nebulae and galaxies.

The Personal Solar Telescope is a legendary little scope. It's only 40mm of aperture, and still one of the best ways to get some great hydrogen-alpha views or images of the sun.

Capture spectacular wide-field deep sky images in seconds with Celestron's portable 8" Rowe-Ackermann Schmidt Astrograph. This incredibly fast f/2.0 system is the perfect companion to today's colour astronomical CMOS cameras or smaller CCD cameras.

This iconic optical tube provides the best balance of portability, handling ease, light gathering ability and price ever offered to the amateur astronomer.

4" Refractors are probably the most versatile scope you can get and this is a great example. It's a fantastic scope for astrophotography, and it's pretty impressive visually as well.

An aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view.

Please note that edphII has been discontinued. EDPHIII is now available! Since the Sharpstar 61EDPH astrograph was launched, it has garnered a worldwide cult following. Not blinded by the accomplishment and applause, Sharpstar, humble and prudent,...

The generation III 61EDPH moves the series one more step towards perfection in the 270-360mm focal length. It's a great choice for anyone looking for a compact light weight package with uncompromised image quality.

The new ZWO APO's are fantastic mid-focal length refractors. The quintuplet design is a modified petzval that will give nice wide views with pinpoint stars and flat corners. Super versatile with the matched reducer.

Its big 8" aperture and fast f/4.0 focal ratio allow the capture of faint galaxies and nebulas with short photographic exposure times - and for a fraction of the price that a premium "apo" refractor...

With an 80mm aperture triplet objective featuring FPL-53 extra-low dispersion glass, views and captured images come through true to colour and exhibit tack-sharp resolution.

Advanced Coma-Free LX200 Optical Tube comes w/ Meade's Ultra-High Transmission Coatings, Oversized Low-Expansion Borosilicate Primary Mirror, Schott Borofloat Glass Corrector Plate, Diffraction Limited Optics, Losmandy-style dovetail, and Dust Cover.

These doublet refractors deliver dramatic, coal-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none.

The TeleVue TV85APO provides stunning 4.4° rich-field because of the combination of apochromatic doublet lens and special low-dispersion glass. This combination enhances observation and makes objects dazzle right before your eyes.

The FRA series are Askar's fast, wide astrographs. These are beautifully executed refractors that will deliver nice flat images with a huge field of view. The 90mm is a great size and will give great...

The SkyWatcher Evostar series are are beautiful doublet apochromatic apochromatic refractors. They'll help deliver beautiful wide-field images of and are great options for astrophotography.

The new ZWO APO's are fantastic mid-focal length refractors. The quintuplet design is a modified petzval that will give nice wide views with pinpoint stars and flat corners. Super versatile with the matched reducer.

With exceptional optics, top-notch features and beautiful fit and finish, the Orion EON 115mm ED Triplet refractor telescope offers wide-field observers and astrophotographers an impeccably crafted, true-color instrument at a great price.

The Celestron C8 is the direct (but much improved) descendent of Celestron's revolutionary C8 that transformed the hobby of astronomy when it was unveiled in 1970.

An aplanatic, flat field Schmidt-Cassegrain telescope that produces aberration-free images across a wide visual and photographic field of view.

The SkyWatcher Evostar series are are beautiful doublet apochromatic apochromatic refractors. They'll help deliver beautiful wide-field images of and are great options for astrophotography.

For 30 years, TeleVue has pushed the boundaries of APO refractors, as well as eyepieces, to the recognized pinnacle of performance. We were gratified but not surprised that Backyard Astronomer's Guide said of the NP101:...

The iOptron® Rumak-type 150mm Maksutov-Cassegrain is perfect for the serious amateur astronomer who wants apochromatic refractor-type performance at an affordable price. In fact, the multicoated and fully-baffled optics provide almost similar results as a 5-inch...

Whether you’re looking to delve into the details of our solar system or explore inspiring deep sky treasures, this versatile FirstLight series telescope will fit your individual needs. Each of the combinations in this new...

The new ZWO APO's are fantastic mid-focal length refractors. The quintuplet design is a modified petzval that will give nice wide views with pinpoint stars and flat corners. Super versatile with the matched reducer.

This Z61 refractor gives a high power performance both visually and, when paired with the P-FLAT61R (not included), for lunar photography. The ZenithStar 61 is a great instrument you'll be able to appreciate for several...

The FMA230 can solely function as a lens to observe the ground scenery or stars in the sky, or as a telescope for direct-focus photography. You should just fine-tune the helical focuser to perfectly focus...

The Celestron C11-A packs serious light gathering ability into a rugged aluminum optical tube. At only 24 inches long and weighing just 27.5 pounds, this telescope is still portable enough to be taken to dark...

Building on Meade's award-winning Advanced Coma-Free (ACF) optics, the 10" OTA employs a fast f/8 optical system with high-contrast baffling that ensures crisp, pinpoint imaging to the very edge of the field.

Whether you're looking to delve into the details of our solar system or explore inspiring deep sky treasures, the versatile FirstLight series has an observing package that will fit your individual needs. Designed and built...

The Quattro imaging Newtonian is an affordable, large aperture astrograph, ideal for users searching for a fast imaging system that will work for both astrophotography and visual astronomy.

If you're seeking crisp, contrasty views with high levels of detail, look no further than the Skymax series, Sky-Watcher's premiere line of Maksutov-Cassegrains.

Sometimes there's no substitute for extra aperture. This 108mm refractor can gather a lot of light and will bring out extraordinary detail in the faintest deep sky objects. This is a great astrograph for any...

The TeleVue TV85APO provides stunning 4.4° rich-field because of the combination of apochromatic doublet lens and special low-dispersion glass. This combination enhances observation and makes objects dazzle right before your eyes.

76mm, f/6.3, APO (Doublet) Refractor. From astronomical, to spotting, to birding, the TeleVue-76 combines compact size with the APO optical performance of the TeleVue-85.

Premium apochromatic refractors are something special. You'll get stunning views and mind-blowing images out of this superb triplet refractor. The Sky-Watcher Esprit uses world class glass and optical design to ensure clear, high quality views.

An affordable and flexible design for any astrophotographer or visual astronomer. The Askar 120APO allows for multiple use cases at an affordable price!

The Meade 8" LX90 ACF telescope is an extremely versatile, high-resolution Go-To telescope, in a very compact form given the large aperture.

When 51mm isn't quite enough you can step up to this super-sized RedCat. The same legendary optical design and premium glass in a larger aperture option. These are pretty incredible astrographs.