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Telescope Optical Tube Assemblies

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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.
$479.99
3 easy payments of $160.00
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.
$249.99
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Orion 203mm f/4.9 Reflector Telescope Optical Tube Assembly
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
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Orion 254mm f/4.7 Reflector Telescope Optical Tube Assembly
4.8 / 5.0
Do you already own an equatorial mount? Add the Orion 254mm optical tube to get vivid, close-up views of deep-sky and solar system objects. This telescope includes a prime-focus camera adapter for astrophotography.
$499.99
3 easy payments of $166.66
With payment plan
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Celestron Rowe-Ackermann 11" Schmidt Astrograph OTA
The Rowe-Ackermann Schmidt Astrograph helps you capture impressive deep-sky astroimages with its 11-inch f/2.2 optical design and rare-earth glass for true color images. Custom engineered linear brass focuser bearing reduces image shift.
$3,599.00
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Celestron C11-A XLT Schmidt-Cassegrain OTA with CG5 dovetail
The f/10 Celestron C11-A 11" SCT Optical Tube Assembly features premium StarBright XLT coatings and includes a 40mm eyepiece, 9x50 finder scope, star diagonal, and a dovetail mounting rail compatible with the Celestron CG-5 Advanced Series mount.
$2,499.95
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Celestron C11-A XLT Schmidt-Cassegrain OTA with CGE dovetail
The f/10 Celestron C11-A 11" SCT Optical Tube Assembly features Celestron's premium StarBright XLT coatings and includes a 40mm eyepiece, 9x50 finder scope, star diagonal, and a dovetail mounting rail compatible with the Celestron CGE mount.
$2,469.95
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Celestron C9.25-A XLT CG5 Schmidt-Cassegrain Telescope OTA
The Celestron C9.25-A 9.25" SCT Optical Tube Assembly features Celestron's premium StarBright XLT coatings and includes a 25mm eyepiece, 6x30 finder scope, star diagonal, and a dovetail mounting rail compatible with the CG-5 Advanced Series mount.
$1,479.00
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Meade LX70 M6 6" Maksutov-Cassegrain Telescope OTA
The Meade LX70 6" Mak features an advanced Maksutov-Cassegrain design for pinpoint star images and extraordinary contrast, making it a great deep sky performer and ideal for detailed lunar and planetary observation.
$799.00

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Celestron C8-A Schmidt-Cassegrain Optical Tube Assembly
The f/10 Celestron C8-A 8" SCT Optical Tube Assembly features Celestron's premium StarBright XLT coatings and includes a 25mm eyepiece, 6x30 finder scope, star diagonal, and a dovetail mounting rail compatible with the Celestron CGE mount.
$1,049.95
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Celestron C8-A Schmidt-Cassegrain Optical Tube Assembly
The f/10 Celestron C8-A 8" SCT Optical Tube Assembly features Celestron's premium StarBright XLT coatings and includes a 25mm eyepiece, 6x30 finder scope, star diagonal, and a dovetail mounting rail compatible with the CG-5 Advanced Series mount.
$1,059.95
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Celestron C9.25-A Schmidt-Cassegrain Optical Tube Assembly
The f/10 Celestron C9.25-A 9.25" SCT Optical Tube Assembly features Celestron's premium StarBright XLT coatings and includes a 25mm eyepiece, 6x30 finder scope, star diagonal, and a dovetail mounting rail compatible with the Celestron CGE mount.
$1,469.95
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Celestron C-14-A Schmidt-Cassegrain Optical Tube Assembly
The f/11 Celestron C14-AF 14" SCT Optical Tube Assembly features Celestron's premium StarBright XLT coatings and includes a 40mm eyepiece, 9x50 finder scope, 2" mirror diagonal, and a dovetail mounting rail compatible with the Celestron CGE mount.
$4,999.95
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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.