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Telescope Optical Tube Assemblies

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Orion 8" f/4 Newtonian Reflector Astrograph
3.0 / 5.0
Buckle up, because this is one fast astrograph! Its prodigious light grasp (200mm aperture) and zippy f/4 focal ratio combine to capture tremendous detail and light with short exposures from DSLR or dedicated astro cameras. Super affordable, too!
$699.99
3 easy payments of $233.33
With payment plan
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Orion 10" f/4 Newtonian Reflector Astrograph
With its big 10" aperture and 1000mm focal length, this fast f/4 astrophotographic powerhouse will take your imaging to an exciting new level. And it's way more affordable than premium "apo" refractors with just a fraction of its aperture.
$899.99
3 easy payments of $300.00
With payment plan
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Orion ED80T CF Triplet Apochromatic Refractor Telescope
4.6 / 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.
$999.99
3 easy payments of $333.33
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.
$1,199.99
3 easy payments of $400.00
With payment plan
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Orion ShortTube 80 Refractor Telescope Optical Tube Assembly
4.8 / 5.0
As a guide scope for long-exposure astrophotography or as a wide-field visual telescope, the "ST80 OTA" is a pint-sized powerhouse. Sold without accessories, this versatile 80mm f/5 achromatic refractor is ready to customize to your needs.
$109.99
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Orion 6" f/4 Newtonian Astrograph Reflector Telescope
4.3 / 5.0
With fast f/4 optics and 94% reflectivity coatings, this 6" Newtonian Astrograph acquires high-resolution images of deep-sky objects with short exposure times so you can get great results quickly. Includes 8x50 finder, hinged tube rings and more.
$499.99
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Orion EON 85mm ED-X2 f/6.6 Triplet Apo Refractor Telescope
4.0 / 5.0
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.
$1,499.99
3 easy payments of $500.00
With payment plan
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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.
$699.99
3 easy payments of $233.33
With payment plan
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Orion CT80 80mm Compact Refractor Telescope Optical Tube
3.3 / 5.0
The fully coated Orion CT80 refractor is a compact, 80mm aperture telescope optical tube that delivers bright, wide-field views. Great for use as a guide scope, or for daytime viewing and stargazing. All accessories sold separately.
$99.99
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Orion EON 104mm ED-X2 f/6.25 Triplet Apo Refractor Telescope
5.0 / 5.0
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.
$2,099.99
3 easy payments of $700.00
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.
$2,599.99
3 easy payments of $866.66
With payment plan
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Orion StarBlast 62mm Compact Travel Refractor Telescope
4.9 / 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.
$379.99
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Orion 14" f/8 Truss Tube Ritchey-Chretien Astrograph
Our 14" f/8 Truss Tube RC combines low-expansion quartz mirror optics of 2848 focal length, a sturdy Serrurier carbon fiber truss system, and a 3" dual-speed linear bearing focuser, making it an observatory-class instrument for serious astroimagers.
$5,999.99
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Orion 16" f/8 Truss Tube Ritchey-Chretien Astrograph
Our 16" f/8 Truss Tube RC combines low-expansion quartz mirror optics of 3250mm focal length, a sturdy Serrurier carbon fiber truss system, and a 3" dual-speed linear bearing focuser, making it an observatory-class instrument for serious imagers.
$6,999.99
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Orion EON 115mm ED Triplet Apochromatic Refractor Telescope
4.8 / 5.0
The Orion EON 115mm Triplet ED Apochromatic Refractor features exquisite optics and mechanics for the discerning observer and imager. Features a 2.5" focuser, twist lock compression rings, sliding dew shield, and includes a hard case for transport.
$1,599.99
3 easy payments of $533.33
With payment plan
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Orion EON 130mm ED Triplet Apochromatic Refractor Telescope
5.0 / 5.0
The Orion EON 130mm Triplet ED Apochromatic Refractor features exquisite optics and mechanics for the discerning observer and imager. Features a 2.5" focuser, twist lock compression rings, sliding dew shield, and includes a hard case for transport.
$2,299.99
3 easy payments of $766.66
With payment plan
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Orion 80mm ED Semi-Apo Binocular Spotting Scope
Enjoy two-eyed viewing with this premium 80mm ED Semi-Apo spotting scope with rotatable binocular viewer and two 12.5mm (40x) Orion Edge-On eyepieces. Incredible 3D-like depth of field. Great for terrestrial or wide-field astronomical pursuits.
$1,299.99
3 easy payments of $433.33
With payment plan
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Orion ShortTube 80-T Refractor Telescope
4.7 / 5.0
This compact, grab-and-go 80mm refractor is outfitted for enjoyable daytime terrestrial viewing and casual nighttime stargazing. Just pop it on a telescope mount or photo tripod and start exploring! Includes high- and low-power Plossl eyepieces.
$179.99
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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.
$599.99
3 easy payments of $200.00
With payment plan
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Orion EON 110mm ED f/6.0 Apochromatic Refractor Telescope
4.3 / 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
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!

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.