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Telescope Optical Tube Assemblies

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Orion EON 85mm ED-X2 f/6.6 Triplet Apo Refractor Telescope
Featuring two ED glass elements for remarkable true-color performance, the Orion EON 85mm ED-X2 Triplet Apo Refractor will satisfy even the most demanding astrophotographers and observers. Includes hard case, 2" dual-speed focuser, and more.
$2,699.99
3 easy payments of $900.00
With payment plan
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Orion EON 104mm ED-X2 f/6.25 Triplet Apo Refractor Telescope
With two ED glass elements for remarkable true-color performance, the Orion EON 104mm f/6.25 ED-X2 Triplet is certain to satisfy your "apo" appetite. Features a 2.7" dual-speed focuser, and includes a hard case, tube rings, dovetail bar and more.
$3,499.99
3 easy payments of $1,166.66
With payment plan
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Orion 150mm Maksutov-Cassegrain Telescope Optical Tube
4.8 / 5.0
The compact Orion 150mm Mak-Cass Telescope Optical Tube Assembly (OTA) opens up new vistas of the celestial landscape for your viewing pleasure, putting superior resolving power at your disposal. Sold as OTA only, without accessories.
$629.99
3 easy payments of $210.00
With payment plan
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Orion 10" f/8 Ritchey-Chretien Astrograph Telescope
Go after even the most elusive and faint deep-sky targets with the Orion 10" f/8.0 Ritchey-Chretien Astrograph. Featuring flat-field, virtually coma-free optics for superb imaging performance, the Orion 10" RC boasts a plethora of deluxe features.
$2,799.99
3 easy payments of $933.33
With payment plan
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Orion 8" f/8 Ritchey-Chretien Astrograph Telescope
5.0 / 5.0
This 8" aperture Ritchey-Chretien optical tube is ideal for the advanced astrophotographer using small format CCD cameras and DSLRs. Offers a wide, fully illuminated field with pinpoint star clarity and includes an array of high-end features.
$999.99
3 easy payments of $333.33
With payment plan
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Orion 6" f/9 Ritchey-Chretien Astrograph Telescope
5.0 / 5.0
This compact 6"-aperture Ritchey-Chrétien optical tube provides advanced astrophotography performance at an incredible price. It is ideal for use with small-format CCD cameras as well as DSLR cameras for deep-sky and solar system astrophotography.
$499.99
3 easy payments of $166.66
With payment plan
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Orion EON 115mm ED Triplet Apochromatic Refractor Telescope
5.0 / 5.0
If you're looking for an exquisitely constructed "apo" refractor that can achieve amazing results for both astrophotography and serious visual observing, the versatile Orion EON 115mm ED Triplet is an ideal choice.
$1,799.99
3 easy payments of $600.00
With payment plan

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Orion Premium 190mm f/5.3 Mak-Newt Astrograph Telescope
4.8 / 5.0
This high-performing telescope rivals apochromatic refractors, at a fraction of the price. The Orion 190mm Mak-Newt will deliver crisp and detailed views of deep-sky objects. Attach a camera to capture beautiful images of even the faintest objects.
$1,599.99
3 easy payments of $533.33
With payment plan
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Orion StarBlast 62mm Compact Travel Refractor Telescope
5.0 / 5.0
Extremely portable at 3.1lbs. and just over a foot long with its lens shade retracted, the finely crafted StarBlast 62mm Compact Travel Refractor packs a ton of performance into its small telescope body and can be used for any type of observing.
$399.99
3 easy payments of $133.33
With payment plan
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Orion 8" f/3.9 Newtonian Astrograph Reflector Telescope
4.8 / 5.0
Our 8" aperture deep-sky imaging specialist has features usually reserved for much pricier astrophotography telescopes. The 8" f/3.9 Newtonian Astrograph features nine internal baffle rings, a recessed and reinforced focuser, and exceptional optics.
$549.99
3 easy payments of $183.33
With payment plan
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Orion 10" f/3.9 Newtonian Astrograph Reflector Telescope
4.6 / 5.0
A very affordable 10" telescope, capable of capturing incredibly deep images, the Orion 10" f/3.9 Newtonian reflector astrograph is an amazing performer. The coatings are 94% reflective, and the 2" dual speed crayford focuser is rock solid.
$729.99
3 easy payments of $243.33
With payment plan
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Orion ED80T CF Triplet Apochromatic Refractor Telescope
4.8 / 5.0
The Orion ED80T CF is perfect for the amateur astrophotographer and visual enthusiast. This 80mm aperture apochromatic refractor provides true to color views and images. It is light weight and portable so you can view and photograph anywhere.
$949.99
3 easy payments of $316.66
With payment plan
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Orion 180mm Maksutov-Cassegrain Telescope Optical Tube
5.0 / 5.0
Superb high-power performance, compact lightweight design, sharp high-contrast view, and clearly defined astrophotography capabilities make the Orion 180mm Maksutov-Cassegrain perfect for the advanced planetary observer or astrophotographer.
$1,199.99
3 easy payments of $400.00
With payment plan
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Orion EON 130mm ED Triplet Apochromatic Refractor Telescope
5.0 / 5.0
This gorgeous refractor sports a three-element ED objective and huge 3" dual-speed Crayford focuser. Its big, 130mm (5.1") aperture and moderately fast f/7.0 optics make the EON 130mm Triplet ED an excellent telescope for both imaging and stargazing.
$2,999.99
3 easy payments of $1,000.00
With payment plan
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Orion Apex 90mm Maksutov-Cassegrain Telescope
4.8 / 5.0
The Orion Apex 90mm Maksutov-Cassegrain telescope is both high-power and compact - perfect for the beginner for both astronomy and terrestrial viewing. The correct-image finder scope makes locating objects easy.
$239.99
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Orion Apex 102mm Maksutov-Cassegrain Telescope
4.7 / 5.0
The compact yet powerful Orion Apex 102mm Maksutov-Cassegrain telescope is great for observers wanting to get fantastic views during the night or day. Small enough that you can tuck it into a daypack or store it on a bookshelf.
$299.99
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Orion Apex 127mm Maksutov-Cassegrain Telescope
4.9 / 5.0
Outstanding image quality, incredible range of use, and portability make the Apex 127mm Mak-Cass perfect for the intermediate viewer. Use with any mount or tripod for nightitme or daytime viewing.
$399.99
3 easy payments of $133.33
With payment plan
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Orion ED80 80mm f/7.5 Apochromatic Refractor Telescope
4.8 / 5.0
In the Orion ED80 Apo Refractor, images appear extremely sharp with no false color. This telescope is suited for viewing both planetary and deep-sky objects as well as for astrophotography. Perfect for the intermediate observer or astrophotographer.
$449.99
3 easy payments of $150.00
With payment plan
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Orion 120mm f/5.0 Refractor Telescope Optical Tube Assembly
4.8 / 5.0
This compact large-aperture f/5 refractor telescope is perfect for wide-field views and deep-sky pursuits. Weighing in at just 8.6 pounds, the 120mm f/5 Refractor OTA makes a great portable telescope for astronomers on-the-go.
$279.99
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Orion 203mm f/4.9 Reflector Tube with Crayford-Style Focuser
4.6 / 5.0
This Orion 203mm Reflector optical tube is perfect for those intermediate observers who already own an equatorial mount. Use the included camera adapter and attach this to your favorite DSLR or CCD camera to begin your astrophotography journey.
$279.99
Compare

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More About Telescope Optical Tube Assemblies
Orion Telescopes sells a variety of telescope optical tube assemblies (OTAs) for those who already own a suitable telescope mount or camera tripod. Many of these telescope optical tubes are offered without accessories to allow you to outfit them with telescope accessories you may already own. Adding a new telescope optical tube assembly is a great way to expand your observing or astrophotography repertoire! Click the "Resources to Help You Choose a Telescope" link above for more information.

Please Note:
Any discounts and/or promotional offers apply only to products listed on their respective pages. Prices valid only while supplies last and are limited to stock on hand.

Products on sale or subject to promotional offers are limited to two units per customer. Large volume orders are subject to special order policies — contact our Customer Service Department for additional details.

Pricing and/or promotions are subject to change without notice.