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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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  • $1,734.00 - $1,734.00
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    TeleVue TV-76 3" (76mm) f/6.3 Evergreen Tube/Black Trim APO Refractor OTA

    TeleVue
    More on the way

    The TV-76 uses a 3" (76mm) true apochromatic doublet lens using an SD (special dispersion) glass element. Thanks to this special low chromatic disp...

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    $1,734.00 - $1,734.00
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    $1,734.00
  • 10" f/4 carbon fiber truss-tube imaging Newtonian
    $1,795.00 - $1,795.00
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    Astro-Tech 10" f/4 Carbon Fiber Truss-Tube Imaging Newtonian

    Astro-Tech
    More on the way

    For serious deep space astrophotographers, this Sky & Telescope 2016 Hot Product 10" Astro-Tech AT10INT carbon fiber truss tube imaging Newtoni...

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    $1,795.00 - $1,795.00
    $1,795.00
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  • $1,815.00 - $1,815.00
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    Sky-Watcher 12" Quattro 300P Imaging Newtonian S11230

    Sky-Watcher
    More on the way

    The Sky-Watcher 12" Quattro will bring your imaging into the next level. The Sky-Watcher 12" f/4 Quattro Imaging Newtonian has . . . 305mm apertu...

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    $1,815.00 - $1,815.00
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  • $4,499.99 - $4,499.99
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    Explore Scientific 152mm f/8 FCD-1 ED Triplet Refractor, Carbon Fiber, 2.5" Hex Rack And Pinion Focuser

    Explore Scientific
    In Stock

    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
  • Astro-Tech 14" f/8 truss tube Ritchey-Chrétien optical tube
    Sold out
    $6,049.00 - $6,049.00
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    $6,049.00 - $6,049.00
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    Astro-Tech 14" f/8 Truss Tube Ritchey-Chrétien Optical Tube

    Astro-Tech
    Sold Out

    This new version of the Hot Product for 2015 Astro-Tech AT14RCT carbon fiber truss Ritchey-Chrétien makes high quality DSLR and CCD imaging afforda...

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    $6,049.00 - $6,049.00
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    $6,049.00 - $6,049.00
    $6,049.00
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  • Astro-Tech 12" f/8 truss tube Ritchey-Chrétien optical tube
    Sold out
    $4,495.00 - $4,495.00
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    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
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    $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
    Sold out
  • Astro-Tech 10" f/8 Ritchey-Chrétien carbon fiber optical tube
    $3,495.00 - $3,495.00
    $3,495.00
    $3,495.00 - $3,495.00
    $3,495.00

    Astro-Tech 10" f/8 Ritchey-Chrétien Carbon Fiber Optical Tube

    Astro-Tech
    More on the way

    After many customer requests, we are proud to now offer the Astro-Tech AT10RC Ritchey-Chrétien astrograph, a Sky and Telescope Hot Product for 2010...

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    $3,495.00 - $3,495.00
    $3,495.00
    $3,495.00 - $3,495.00
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  • Astro-Tech 10" f/8 Ritchey-Chrétien optical tube
    $2,495.00 - $2,495.00
    $2,495.00
    $2,495.00 - $2,495.00
    $2,495.00

    Astro-Tech 10" f/8 Ritchey-Chrétien Optical Tube

    Astro-Tech
    More on the way

    The 10" Astro-Tech AT10RC Ritchey-Chrétien astrograph is a Sky & Telescope Hot Product for 2010 and an Astronomy Star Product for 2010 award wi...

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    $2,495.00 - $2,495.00
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    $2,495.00 - $2,495.00
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  • FSQ-106ED "New Q" 4.2" F/5 dual ED/four element design
    $7,330.00 - $7,330.00
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    Takahashi FSQ-106EDX4 4.2" F/5 Dual ED/Four Element Optical Tube

    Takahashi
    More on the way

    This Takahashi FSQ-106EDX4 quadruplet is the ultimate portable no-compromise photo/visual refractor. The Takahashi FSQ-106EDX4 quadruplet is a rede...

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    $7,330.00 - $7,330.00
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    $7,330.00 - $7,330.00
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  • $13,999.00 - $13,999.00
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    Celestron RASA 36 Rowe-Ackermann Schmidt Astrograph V2 OTA 91078

    Celestron
    More on the way

      Highlights A breakthrough 36 cm aperture, f/2.2 optical system designed for professional applications that require both a wide field of view and...

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    $13,999.00 - $13,999.00
    $13,999.00
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  • $5,999.00 - $5,999.00
    $5,999.00
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    $5,999.00

    Celestron 14" SCT Fastar-Compatible Optical Tube, CGE/Losmandy Dovetail

    Celestron
    More on the way

    There are state-of-the-art Starbright XLT multicoatings on the hand-figured 14" aperture SCT optics of this impressive optical tube, plus a Fastar-...

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    $5,999.00 - $5,999.00
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  • $2,499.00 - $2,499.00
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    Astro-Tech AT126EDQ f/7 Quad Refractor

    Astro-Tech
    More on the way

    This Astro-Tech AT126EDQ ED refractor has: • 126mm f/7 fully multicoated four-lens/two-group refractor• two ED lens elements• amazing flat field as...

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    $2,499.00 - $2,499.00
    $2,499.00
    $2,499.00 - $2,499.00
    $2,499.00
  • $595.00 - $595.00
    $595.00
    $595.00 - $595.00
    $595.00

    Sky-Watcher Quattro 150P Imaging Newtonian S11205

    Sky-Watcher
    More on the way

    Sky-Watcher Quattro 150P Imaging Newtonian Reflector The Sky-Watcher Quattro 150P is a fast, precision-engineered Newtonian reflector designed from...

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    $595.00 - $595.00
    $595.00
    $595.00 - $595.00
    $595.00
  • Questar Field Model, 90mm, broadband coatings, Zerodur mirror, 53/80x, case
    $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
    More on the way

    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
  • $799.00 - $799.00
    $799.00
    $799.00 - $799.00
    $799.00

    ZWO FF65 APO OTA

    ZWO
    More on the way

    The ZWO FF series is a potential fit for your astro-photography needs. The ZWO FF65 APO is a flat field astrograph that can be used visually as wel...

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    $799.00 - $799.00
    $799.00
    $799.00 - $799.00
    $799.00
  • $848.00 - $848.00
    $848.00
    $848.00 - $848.00
    $848.00

    iOptron 6" Maksutov Cassegrain Optical Tube

    iOptron
    More on the way

    Enjoy scanning the night skies with this fantastic 6" iOptron Maksutov. The iOptron® Rumak-type 150mm Maksutov-Cassegrain is perfect for the seriou...

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    $848.00 - $848.00
    $848.00
    $848.00 - $848.00
    $848.00
  • $5,510.00 - $5,510.00
    $5,510.00
    $5,510.00 - $5,510.00
    $5,510.00

    Takahashi Epsilon E-180ED Astrograph

    Takahashi
    More on the way

    The Takahashi Epsilon E-180ED is fast imaging system for the most discerning user. The Epsilon series of astrographs are specifically designed for ...

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    $5,510.00 - $5,510.00
    $5,510.00
    $5,510.00 - $5,510.00
    $5,510.00
  • $1,580.00 - $1,580.00
    $1,580.00
    $1,580.00 - $1,580.00
    $1,580.00

    Takahashi FOA-60 Ortho Apochromatic Refractor

    Takahashi
    More on the way

    The Takahashi FOA-60 is a fantastic compact fluorite doublet refractor with correction similar to the larger TOA series. The FOA-60 is a new compac...

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    $1,580.00 - $1,580.00
    $1,580.00
    $1,580.00 - $1,580.00
    $1,580.00
  • 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
    Sold out
  • AT60EDT 60mm f/7 ED triplet apo refractor, white and gray tube
    Sold out
    $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
    Sold out
  • TOA-150B 5.9" F/7.33 Ortho-Apochromat Triplet Refractor OTA
    $15,070.00 - $15,070.00
    $15,070.00
    $15,070.00 - $15,070.00
    $15,070.00

    Takahashi TOA-150B 5.9" F/7.33 Ortho-Apochromat Triplet Refractor OTA

    Takahashi
    More on the way

    This big Takahashi 5.9" ED triplet refractor is optically too good to be called simply an apochromatic scope. Only the term ortho-apochromatic is g...

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    $15,070.00 - $15,070.00
    $15,070.00
    $15,070.00 - $15,070.00
    $15,070.00

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