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Telescope Optical Tube Assemblies

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Orion 10" f/3.9 Newtonian Astrograph Reflector Telescope
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.
£ 646.79
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Orion 8" f/3.9 Newtonian Astrograph Reflector Telescope
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.
£ 461.99
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Orion ED80T CF Triplet Apochromatic Refractor Telescope
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.
£ 889.38
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Orion Apex 127mm Maksutov-Cassegrain Telescope
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.
£ 299.99
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Orion ED80 80mm f/7.5 Apochromatic Refractor Telescope
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.
£ 464.22
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Orion StarBlast 62mm Compact Travel Refractor Telescope
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.
£ 320.27
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Orion Apex 90mm Maksutov-Cassegrain Telescope
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.
£ 174.99
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Orion 180mm Maksutov-Cassegrain Telescope Optical Tube
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.
£ 879.99
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Orion 120mm f/5.0 Refractor Telescope Optical Tube Assembly
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.
£ 220.79
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Orion Apex 102mm Maksutov-Cassegrain Telescope
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.
£ 199.99
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Orion 10" f/8 Ritchey-Chrétien 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.
£ 1,999.99
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Orion 203mm f/4.9 Reflector Telescope Optical Tube Assembly
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.
£ 239.99
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Orion 8" f/8 Ritchey-Chretien Astrograph Telescope
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.
£ 779.99
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Orion 6" f/9 Ritchey-Chretien Astrograph Telescope
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.
£ 429.99
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Orion 254mm f/4.7 Reflector Telescope Optical Tube Assembly
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.
£ 479.99
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Orion 150mm Maksutov-Cassegrain Telescope Optical Tube
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.
£ 519.99
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Orion 6" f/4 Newtonian Astrograph Reflector Telescope
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.
£ 393.59
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Orion Premium 190mm f/5.3 Mak-Newt Astrograph Telescope
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.
£ 1,299.99
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Orion 70mm White-Light Solar Refractor Telescope
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.
£ 115.99
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Orion CT80 80mm Compact Refractor Telescope Optical Tube
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.
£ 89.99
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About Orion Telescopes & Binoculars

Since 1975 Orion Telescopes & Binoculars has been offering telescopes for sale direct to customers. Now an employee-owned company, we pride ourselves on an unswerving commitment to best quality products, value and unmatched customer care. Our 100% satisfaction guarantee says it all.

Orion offers telescopes for every level: Beginner, Intermediate, and Advanced. From our entry-level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you. Because we sell direct, we can offer you tremendous value at a great price.

Orion binoculars are known for quality optics at a great price. We offer binoculars for every viewing interest, including astronomical binoculars, compact binoculars, waterproof binoculars, birding binoculars, and sport and hunting binoculars.

Orion's telescope and astrophotography accessories will enhance your telescope enjoyment without breaking the bank. Expand your viewing experience with accessories ranging from moon filters to power-boosting Barlow lenses to advanced computerized telescope mounts. Capture breathtaking photos with our affordable astrophotography cameras. And when you're stargazing, Orion's telescope cases and covers, observing gear, red LED flashlights, astronomy books and star charts will make your observing sessions more convenient, comfortable and meaningful.