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OTA

The optical tube is really the heart of your night time exploration.  Sizes range from 50mm to 20" in diameter as well as f/ratios from f/2.2 to f/15.  The optical designs range from simple doublet refractors to complex cassegrains with built-in field flatteners.  There is literally something for everyone here, you just have to decide what path you want to walk down.  We are always here to help with any questions you have.

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  • Sold out
    $849.00
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    $600.00
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    $600.00

    Astro-Tech AT60EDP 60mm f/5 Dual ED Petzval OTA

    Astro-Tech
    Sold Out

    This unique Astro-Tech apochromatic ED petzval fast focal ratio refractor has an incredible flat field for your astro-photography endeavors.  This ...

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    $849.00
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    $600.00
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    $600.00
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    $1,595.00 - $1,595.00
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    $1,595.00

    Astro-Tech AT90CFT Limited Edition f/6 Triplet APO Refractor Carbon Fiber OTA

    Astro-Tech
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    This Astro-Tech AT90CFT refractor has: • 90mm f/6 apochromatic triplet optics using an FCD-100 ED element• 2.5" dual-speed rotating rack and pinion...

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    $1,595.00 - $1,595.00
    $1,595.00
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    $1,595.00
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  • Astro-Tech 6" f/9 Ritchey-Chrétien astrograph
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    $479.95 - $479.95
    $479.95
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    $479.95

    Astro-Tech 6" f/9 Ritchey-Chrétien Astrograph

    Astro-Tech
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    The exceptional value 6" Astro-Tech Ritchey-Chrétien astrograph is once again available for the serious deep space astrophotographer on a budget . ...

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    $479.95 - $479.95
    $479.95
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  • Sold out
    $540.00 - $540.00
    $540.00
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    $540.00

    Sky-Watcher Evostar 72mm f/5.8 ED Doublet Apochromatic Refractor

    Sky-Watcher
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    The Evostar 72ED is a portable powerhouse. It is true that great things can come in a small package.. This Sky-Watcher Evostar 72ED apochromatic re...

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    $540.00 - $540.00
    $540.00
    $540.00 - $540.00
    $540.00
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  • Astro-Tech 8" f/8 Ritchey-Chrétien astrograph, steel tube
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    $1,199.00 - $1,199.00
    $1,199.00
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    Astro-Tech 8" f/8 Ritchey-Chrétien Astrograph, Steel Tube

    Astro-Tech
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    The steel tube Astro-Tech AT8RC makes premium 8" Ritchey-Chrétien optics for serious deep space imaging available at the lowest price ever. Sky &am...

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    $1,199.00 - $1,199.00
    $1,199.00
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  • Sold out
    $1,080.00
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    $1,080.00
    $799.00
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    $799.00

    Sky-Watcher Evostar 80ED 80mm f/7.5 ED Doublet Apochromatic Refractor S11100

    Sky-Watcher
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    This 80mm Sky-Watcher Evostar 80ED doublet apochromatic refractor is loaded with performance and features at a very attractive price . . . This Sky...

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    $1,080.00
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    $1,080.00
    $799.00
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  • Sold out
    $2,230.00
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    $1,399.00
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    $1,399.00

    Sky-Watcher Esprit 80mm f/5 ED Apochromatic Triplet Refractor With Field Flattener S11400

    Sky-Watcher
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    The compact Sky-Watcher Esprit 80mm ED apochromatic triplet refractor has the premium high contrast/high resolution optical performance you need to...

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    $2,230.00
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    $2,230.00
    $1,399.00
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    $1,399.00
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  • Astro-Tech 8" f/8 Ritchey-Chrétien astrograph, carbon fiber tube
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    $1,395.00 - $1,395.00
    $1,395.00
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    Astro-Tech 8" f/8 Ritchey-Chrétien Astrograph, Carbon Fiber Tube

    Astro-Tech
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    The Astro-Tech AT8RC is the first affordable 8" Ritchey-Chrétien with premium features available to the amateur astronomer who is into serious deep...

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    $1,395.00 - $1,395.00
    $1,395.00
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    $1,395.00
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    $3,499.99 - $3,499.99
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    $3,499.99

    Explore Scientific 115mm f/5.5 FPL-53 Carbon Fiber APO Triplet Refractor With 3" Hexagonal Focuser

    Explore Scientific
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    The Explore Scientific 115mm f/5.5 FPL53 APO triplet could be the perfect combination telescope. Just big enough to do great observation and fast e...

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    $3,499.99 - $3,499.99
    $3,499.99
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  • Sold out
    $2,375.00
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    $1,999.00
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    $1,999.00

    Sky-Watcher Starlux 190 Maksutov-Newtonian f/5.3 Optical Tube

    Sky-Watcher
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    The Sky-Watcher f/5.3 190mm Maksutov-Newtonian optical system is a quality fast focal ratio performer that excels at deep space imaging and viewing...

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    $2,375.00
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    $2,375.00
    $1,999.00
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  • Questar 7" Astro Maksutov-Cassegrain
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    Questar 7" Astro Maksutov-Cassegrain

    Questar
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    Observe through a Questar Seven Astro, and you'll see detail and clarity in the skies that you have never seen through a lesser scope, or even thro...

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    $11,895.00 - $11,895.00
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  • Questar 7" Classic Titanium Maksutov-Cassegrain, broadband coatings, quartz mirror
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    $14,695.00 - $14,695.00
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    Questar 7" Classic Titanium Maksutov-Cassegrain, Magnesium Fluoride AR and Silver Reflecting Coatings, Quartz Mirror

    Questar
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    This Questar Seven Classic Titanium uses the same quartz mirror and coatings combination as the renowned 50th Anniversary 3.5" Questar, perhaps the...

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    $14,695.00 - $14,695.00
    $14,695.00
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    $14,695.00
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  • Sold out
    $5,999.99 - $5,999.99
    $5,999.99
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    $5,999.99

    Explore Scientific 140mm f/6.7 FPL-53 Carbon Fiber APO Triplet Refractor With 3" Hexagonal Focuser

    Explore Scientific
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    140mm has long been considered the perfect size for an APO refractor. Explore Scientific makes that size a reality with fantastic optics and mechan...

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    $5,999.99 - $5,999.99
    $5,999.99
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    $5,999.99
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  • 12" f/4 carbon fiber truss-tube imaging Newtonian
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    $2,195.00 - $2,195.00
    $2,195.00
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    Astro-Tech 12" f/4 Carbon Fiber Truss-Tube Imaging Newtonian

    Astro-Tech
    Sold Out

    If you are a serious deep space astrophotographers with a big mount, this Sky & Telescope 2016 Hot Product 12" Astro-Tech AT12INT carbon fiber ...

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    $2,195.00 - $2,195.00
    $2,195.00
    $2,195.00 - $2,195.00
    $2,195.00
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  • Questar 7" Classic Titanium Maksutov-Cassegrain, broadband coatings
    Sold out
    $12,795.00 - $12,795.00
    $12,795.00
    $12,795.00 - $12,795.00
    $12,795.00

    Questar 7" Classic Titanium Maksutov-Cassegrain, Broadband Coatings

    Questar
    Sold Out

    There are mere mortal telescopes and then there is the Questar Seven Classic Titanium with broadband coatings, which inhabits a higher plane of ast...

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    $12,795.00 - $12,795.00
    $12,795.00
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    $12,795.00
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  • Sold out
    $4,499.99 - $4,499.99
    $4,499.99
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    $4,499.99

    Explore Scientific 152mm f/8 FCD-1 ED Triplet Refractor, Carbon Fiber, 2.5" Hex Rack And Pinion Focuser

    Explore Scientific
    Sold Out

    This big and optically excellent 152mm (6") Explore Scientific air-spaced ED triplet apochromatic refractor has a carbon fiber body and a 2.5" Hex ...

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    $4,499.99 - $4,499.99
    $4,499.99
    $4,499.99 - $4,499.99
    $4,499.99
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  • Astro-Tech 12" f/8 truss tube Ritchey-Chrétien optical tube
    Sold out
    $4,495.00 - $4,495.00
    $4,495.00
    $4,495.00 - $4,495.00
    $4,495.00

    Astro-Tech 12" f/8 Truss Tube Ritchey-Chrétien Optical Tube

    Astro-Tech
    Sold Out

    This newest Version A of the Astro-Tech AT12RCT carbon fiber Serrurier truss Ritchey-Chrétien Hot Product for 2015 makes high quality large-apertur...

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    $4,495.00 - $4,495.00
    $4,495.00
    $4,495.00 - $4,495.00
    $4,495.00
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  • Astro-Tech 16" f/8 truss tube Ritchey-Chrétien optical tube
    Sold out
    $7,295.00 - $7,295.00
    $7,295.00
    $7,295.00 - $7,295.00
    $7,295.00

    Astro-Tech 16" f/8 Truss Tube Ritchey-Chrétien Optical Tube

    Astro-Tech
    Sold Out

    This newest version of the Astro-Tech AT16RCT carbon fiber Serrurier truss 16" f/8 Ritchey-Chrétien Hot Product for 2015 makes high quality large-a...

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    $7,295.00 - $7,295.00
    $7,295.00
    $7,295.00 - $7,295.00
    $7,295.00
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  • Celestron RASA 36 V2 Astrograph with dual dovetail bars and front lens group
    $14,999.00 - $14,999.00
    $14,999.00
    $14,999.00 - $14,999.00
    $14,999.00

    Celestron RASA 36 Rowe-Ackermann Schmidt Astrograph V2 OTA 91078

    Celestron
    More on the way

    Celestron RASA 36 V2 Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly Item #91078A professional f/2.2 wide-field astrograph with a 36 cm ape...

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    $14,999.00 - $14,999.00
    $14,999.00
    $14,999.00 - $14,999.00
    $14,999.00
  • Questar Field Model, 90mm, broadband coatings, Zerodur mirror, 53/80x, case
    Sold out
    $4,595.00 - $4,595.00
    $4,595.00
    $4,595.00 - $4,595.00
    $4,595.00

    Questar Field Model, 90mm, Broadband Coatings, Zerodur Mirror, 53/80x, Case

    Questar
    Sold Out

    With all due respect to the other spotting scopes shown on this site, there can only be one "best spotting scope in the world." This Questar Field ...

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    $4,595.00 - $4,595.00
    $4,595.00
    $4,595.00 - $4,595.00
    $4,595.00
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  • Sold out
    $11,999.99 - $11,999.99
    $11,999.99
    $11,999.99 - $11,999.99
    $11,999.99

    Explore Scientific 165mm f/7 FPL-53 Carbon Fiber APO Triplet Refractor With 3" Hex Focuser

    Explore Scientific
    Sold Out

    Enjoy serious observation with Explore Scientific's flagship telescope, the 165mm FPL-53 refractor. Reveal celestial wonders like the desolate beau...

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    $11,999.99 - $11,999.99
    $11,999.99
    $11,999.99 - $11,999.99
    $11,999.99
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  • AT60EDT 60mm f/7 ED triplet apo refractor, white and gray tube
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    $599.00 - $599.00
    $599.00
    $599.00 - $599.00
    $599.00

    Astro-Tech At60Edt 60Mm F/7 Ed Triplet Apo Refractor, White And Gray Tube

    Astro-Tech
    Sold Out

    THIS PRODUCT HAS BEEN DISCONTINUED.  THIS PAGE IS HERE FOR INFORMATIONAL PURPOSES ONLY. The Astro-Tech AT60EDT is a very compact/very high quality...

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    $599.00 - $599.00
    $599.00
    $599.00 - $599.00
    $599.00
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