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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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  • TOA-130NFB 5.1" Ortho-Apochromat Triplet Refractor OTA
    $6,760.00 - $6,760.00
    $6,760.00
    $6,760.00 - $6,760.00
    $6,760.00

    Takahashi TOA-130NFB 5.1" Ortho-Apochromat Triplet Refractor OTA

    Takahashi
    More on the way

    This performance of this 4" focuser Takahashi 5.1" ED triplet refractor is too good to let it be called simply an apochromatic scope. Only the term...

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    $6,760.00 - $6,760.00
    $6,760.00
    $6,760.00 - $6,760.00
    $6,760.00
  • $7,699.00 - $7,699.00
    $7,699.00
    $7,699.00 - $7,699.00
    $7,699.00

    Celestron 14" EdgeHD Optical Tube, CGE/Losmandy Dovetail

    Celestron
    In Stock

    The Fastar-compatible EdgeHD high definition flat field optics of this big, big Celestron 14" EdgeHD optical tube give you true astrographic-qualit...

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    $7,699.00 - $7,699.00
    $7,699.00
    $7,699.00 - $7,699.00
    $7,699.00
  • $2,570.00 - $2,570.00
    $2,570.00
    $2,570.00 - $2,570.00
    $2,570.00

    Takahashi Epsilon E-130D Astrograph

    Takahashi
    More on the way

    Wide-field imagers rejoice!  The Takahashi Epsilon E-130D telescope is an incredible wide-field imaging machine. The Epsilon series of astrographs ...

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    $2,570.00 - $2,570.00
    $2,570.00
    $2,570.00 - $2,570.00
    $2,570.00
  • "Explore Scientific 102mm Classic White triplet refractor with FCD100 optics and dual-speed focuser"
    Save $500.00 Save $0.00
    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $1,199.00
    $1,199.00 - $1,199.00
    $1,199.00

    Explore Scientific 102mm f/7 Classic White FCD100 ED Triplet Refractor

    Explore Scientific
    In Stock

    Explore Scientific 102mm f/7 Classic White FCD100 ED Triplet Apochromatic Refractor The Explore Scientific 102mm f/7 Classic White FCD100 Triplet R...

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    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $1,199.00
    $1,199.00 - $1,199.00
    $1,199.00
    Save $500.00 Save $0.00
  • $2,375.00 - $2,375.00
    $2,375.00
    $2,375.00 - $2,375.00
    $2,375.00

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

    Sky-Watcher
    In Stock

    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 - $2,375.00
    $2,375.00
    $2,375.00 - $2,375.00
    $2,375.00
  • TOA-130S 5.1" F/7.7 Ortho-Apochromat Triplet Refractor OTA
    $6,000.00 - $6,000.00
    $6,000.00
    $6,000.00 - $6,000.00
    $6,000.00

    Takahashi TOA-130NS 5.1" f/7.7 Ortho-Apochromat Triplet Refractor OTA

    Takahashi
    More on the way

    This performance of this Takahashi 5.1" ED triplet refractor is too good to let it be called simply an apochromatic scope. Only the term ortho-apoc...

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    $6,000.00 - $6,000.00
    $6,000.00
    $6,000.00 - $6,000.00
    $6,000.00
  • $3,299.95 - $3,299.95
    $3,299.95
    $3,299.95 - $3,299.95
    $3,299.95

    Celestron 11" SCT Optical Tube, CGE/Losmandy Dovetail

    Celestron
    In Stock

    This 24" long aluminum Celestron 11" Schmidt Cassegrain optical tube weighs only 27.5 lbs., making it easy to transport. It has an 11" aperture, a ...

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    $3,299.95 - $3,299.95
    $3,299.95
    $3,299.95 - $3,299.95
    $3,299.95
  • $665.00 - $665.00
    $665.00
    $665.00 - $665.00
    $665.00

    Sky-Watcher Quattro 150P Imaging Newtonian S11205

    Sky-Watcher
    In Stock

    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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    $665.00 - $665.00
    $665.00
    $665.00 - $665.00
    $665.00
  • NP101Is 4" f/5.4 Nagler-Petzval apochromatic refractor
    $4,267.00 - $4,267.00
    $4,267.00
    $4,267.00 - $4,267.00
    $4,267.00

    TeleVue NP101Is 4" f/5.4 Nagler-Petzval Apochromatic Refractor

    TeleVue
    More on the way

    This TeleVue NP-101is is a superb and highly portable apochromatic refractor for both visual observing and imaging . . . This updated and improved ...

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    $4,267.00 - $4,267.00
    $4,267.00
    $4,267.00 - $4,267.00
    $4,267.00
  • $1,049.00 - $1,049.00
    $1,049.00
    $1,049.00 - $1,049.00
    $1,049.00

    Sky Rover 102 GPA Planetary 102mm f/11 Super ED Doublet APO Refractor

    Sky Rover
    More on the way

    There was a time when a four-inch f/11 refractor was the gold standard for planetary observation — the instrument that experienced observers reache...

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    $1,049.00 - $1,049.00
    $1,049.00
    $1,049.00 - $1,049.00
    $1,049.00
  • Sky Rover 102 GPA
    Sky Rover 102 GPA
    $999.00 - $999.00
    $999.00
    $999.00 - $999.00
    $999.00

    Sky Rover 102 GPA 102mm f/7 Super ED Doublet APO Refractor OTA

    Sky Rover
    More on the way

    A 4-inch refractor has long been considered a turning point in visual observing. It retains the portability and ease of smaller instruments, but ad...

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    $999.00 - $999.00
    $999.00
    $999.00 - $999.00
    $999.00
  • Celestron 11" f/2.2 RASA V2 Optical Tube – fast wide-field astrograph for deep sky imaging
    $4,499.00 - $4,499.00
    $4,499.00
    $4,499.00 - $4,499.00
    $4,499.00

    Celestron 11" f/2.2 Rowe-Ackermann Schmidt Astrograph (RASA) Version 2 Optical Tube

    Celestron
    In Stock

    The 11" f/2.2 Rowe-Ackermann Schmidt Astrograph (RASA) - the next advance in deep space imaging - is available now for the serious astrophotographe...

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    $4,499.00 - $4,499.00
    $4,499.00
    $4,499.00 - $4,499.00
    $4,499.00
  • $2,699.00 - $2,699.00
    $2,699.00
    $2,699.00 - $2,699.00
    $2,699.00

    Astro-Tech AT126EDQ f/7 Quad Refractor

    Astro-Tech
    More on the way

    Most refractors need a separate field flattener to image properly. You buy the scope, then you buy the flattener, then you figure out the spacing, ...

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    $2,699.00 - $2,699.00
    $2,699.00
    $2,699.00 - $2,699.00
    $2,699.00
  • $2,599.00 - $2,599.00
    $2,599.00
    $2,599.00 - $2,599.00
    $2,599.00

    Celestron 8” Rowe-Ackermann Schmidt Astrograph (RASA 8) Imaging Kit

    Celestron
    More on the way

      Flat field free of optical aberrations like field curvature, coma, astigmatism and chromatic aberration across an entire APS-C sensor. Unlike th...

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    $2,599.00 - $2,599.00
    $2,599.00
    $2,599.00 - $2,599.00
    $2,599.00
  • $2,340.00 - $2,340.00
    $2,340.00
    $2,340.00 - $2,340.00
    $2,340.00

    Takahashi FOA-60Q Ortho Apochromatic Refractor

    Takahashi
    More on the way

    The included 1.7x extender takes the FOA-60 to another level, as well as letter.  This combination is referred to as the FOA-60Q.  You will simply ...

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    $2,340.00 - $2,340.00
    $2,340.00
    $2,340.00 - $2,340.00
    $2,340.00
  • FSQ-85ED "Baby Q" 3.35" F/5.3 dual ED/four element design
    $4,280.00 - $4,280.00
    $4,280.00
    $4,280.00 - $4,280.00
    $4,280.00

    Takahashi FSQ-85EDX "Baby Q" 3.35" F/5.3 Dual ED/Four Element Design

    Takahashi
    More on the way

    The new Takahashi FSQ-85ED (the "Baby Q") apochromatic ED quadruplet is a clear leader in the ranks of relatively small aperture refractors. Its fo...

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    $4,280.00 - $4,280.00
    $4,280.00
    $4,280.00 - $4,280.00
    $4,280.00
  • Astro-Tech 10" f/8 truss tube Ritchey-Chrétien optical tube
    $3,195.00 - $3,195.00
    $3,195.00
    $3,195.00 - $3,195.00
    $3,195.00

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

    Astro-Tech
    More on the way

    This newest Version A of the Astro-Tech AT10RCT carbon fiber Serrurier truss Ritchey-Chrétien Hot Product for 2015 makes high quality large-apertur...

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    $3,195.00 - $3,195.00
    $3,195.00
    $3,195.00 - $3,195.00
    $3,195.00
  • 2.5" focuser for 125GPA
    Telescope with '125 GPA' marking on a white background, featuring the Sky Rover brand.
    $1,499.00 - $1,499.00
    $1,499.00
    $1,499.00 - $1,499.00
    $1,499.00

    Sky Rover 125 GPA 125mm f/7.8 Super ED Doublet APO Refractor OTA

    Sky Rover
    More on the way

    Five inches of refractor aperture used to mean a serious commitment — a heavy tube, a substantial mount, and a permanent spot in the observatory. T...

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    $1,499.00 - $1,499.00
    $1,499.00
    $1,499.00 - $1,499.00
    $1,499.00
  • $1,999.00 - $1,999.00
    $1,999.00
    $1,999.00 - $1,999.00
    $1,999.00

    Astro-Tech AT106EDQ f/7 Quad Refractor

    Astro-Tech
    More on the way

    You buy a refractor for imaging, and the first thing you learn is that you need a field flattener. Then you learn that the flattener has to match y...

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    $1,999.00 - $1,999.00
    $1,999.00
    $1,999.00 - $1,999.00
    $1,999.00
  • $1,499.00 - $1,499.00
    $1,499.00
    $1,499.00 - $1,499.00
    $1,499.00

    ZWO FF80 APO Refractor OTA

    ZWO
    More on the way

    The ZWO FF80 APO is a highly refined 80mm f/7.5 quadruplet apochromatic refractor, built from the ground up to deliver uncompromising optical perfo...

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    $1,499.00 - $1,499.00
    $1,499.00
    $1,499.00 - $1,499.00
    $1,499.00
  • $3,499.00 - $3,499.00
    $3,499.00
    $3,499.00 - $3,499.00
    $3,499.00

    ZWO FF130 APO Refractor OTA

    ZWO
    More on the way

    The ZWO FF130 APO is a high-performance 130mm f/7.7 quadruplet refractor designed to meet the needs of astrophotographers and visual observers who ...

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    $3,499.00 - $3,499.00
    $3,499.00
    $3,499.00 - $3,499.00
    $3,499.00
  • $2,299.00 - $2,299.00
    $2,299.00
    $2,299.00 - $2,299.00
    $2,299.00

    ZWO FF107 APO OTA

    ZWO
    More on the way

     The ZWO FF series is a potential fit for your astro-photography needs. The ZWO FF107 APO is a finely crafted, high-performance apochromatic refrac...

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    $2,299.00 - $2,299.00
    $2,299.00
    $2,299.00 - $2,299.00
    $2,299.00
  • Save $1,900.99 Save $0.00
    $4,499.99
    $4,499.99 - $4,499.99
    $4,499.99
    $2,599.00
    $2,599.00 - $2,599.00
    $2,599.00

    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
    $2,599.00
    $2,599.00 - $2,599.00
    $2,599.00
    Save $1,900.99 Save $0.00
  • 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
    $2,495.00
    $2,495.00 - $2,495.00
    $2,495.00

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