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Telescope Optical Tube Assemblies

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Orion 6" f/9 Ritchey-Chretien Astrograph Telescope
4.7 / 5.0
This compact 6"-aperture Ritchey-Chretien 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 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.
$249.99
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Orion ED66 CF Carbon Fiber Refractor Telescope
5.0 / 5.0
Featuring fully multi-coated FPL-51 ED glass optics, a dual-speed Crayford focuser and a carbon fiber optical tube, the Orion ED66 CF Refractor is an amazingly versatile telescope capable of delivering true-color views day or night.
$699.99
3 easy payments of $233.33
With payment plan
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Orion Premium 190mm f/5.3 Mak-Newt Astrograph Telescope
4.8 / 5.0
This impressive Maksutov-Newtonian imaging telescope rivals the performance of more costly instruments, at a fraction of the price. The Orion 190mm Mak-Newt delivers crisp and detailed views and images of even the faintest deep-sky objects.
$1,499.99
3 easy payments of $500.00
With payment plan
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Orion Apex 90mm Maksutov-Cassegrain Telescope
4.7 / 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.
$199.99
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Orion 70mm White-Light Solar Refractor Telescope
4.0 / 5.0
A true solar specialist, the lightweight Orion 70mm White-Light Solar Refractor allows you to safely observe the Sun and solar phenomena like sunspots, planetary transits, and eclipses with its built-in solar filter.
$149.99
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Orion EON 110mm ED f/6.0 Apochromatic Refractor Telescope
4.2 / 5.0
Back by popular demand with upgrades, the EON 110mm ED boasts two-element ED optics, 2.7" hybrid-drive RandP focuser, and now twist-tight 2" and 1.25" accessory collars for convenience and security. Superb f/6 astrograph or wide-field visual scope!
$1,299.99
3 easy payments of $433.33
With payment plan
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Orion 10" Truss Tube Ritchey-Chretien Astrograph
Our 10" f/8 Truss Tube Ritchey-Chretien combines low-expansion quartz mirror optics, a Serrurier carbon fiber truss system, and a CNC-machined 3.3" dual-speed linear bearing focuser in what can only be described as an astrophotographic powerhouse.
$2,799.99
3 easy payments of $933.33
With payment plan
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Orion 12" Truss Tube Ritchey-Chretien Astrograph
5.0 / 5.0
Our 12" f/8 Truss Tube Ritchey-Chretien combines low-expansion quartz mirror optics, a Serrurier carbon fiber truss system, and a CNC-machined 3.3" dual-speed linear bearing focuser in what can only be described as an astrophotographic powerhouse.
$3,999.99
3 easy payments of $1,333.33
With payment plan
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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.
Was 
$2,469.95
Now 
$1,899.99
You Save 
$569.96
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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 CG-5 Advanced Series mount.
$1,059.95
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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!

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.