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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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  • $519.00 - $519.00
    $519.00
    $519.00 - $519.00
    $519.00

    Astro-Tech AT72EDII Refractor OTA FPL-53 and Lanthanum f/6 Doublet

    Astro-Tech
    In Stock

    The Astro-Tech AT72EDII takes the performance, and mechanics, of the "product everyone should own" (thank you Astronomy Magazine) and gives it an u...

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    $519.00 - $519.00
    $519.00
    $519.00 - $519.00
    $519.00
  • $419.00 - $419.00
    $419.00
    $419.00 - $419.00
    $419.00

    Astro-Tech AT60ED 60mm f/6 FPL-53ED and Lanthanum Doublet

    Astro-Tech
    In Stock

    This Astro-Tech ED refractor has: 60mm f/6 fully multicoated FPL-53 and Lanthanum doublet refractor optics dual-speed Rack and Pinion 2” focuser w...

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    $419.00 - $419.00
    $419.00
    $419.00 - $419.00
    $419.00
  • $329.00 - $329.00
    $329.00
    $329.00 - $329.00
    $329.00

    Astro-Tech AT70ED 2.8" f/6 ED Refractor OTA

    Astro-Tech
    In Stock

    This Astro-Tech AT70ED refractor has: 70mm f/6 fully multicoated doublet optics using FK-61 ED glass dual-speed 2" Rack and Pinion focuser 2" and ...

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    $329.00 - $329.00
    $329.00
    $329.00 - $329.00
    $329.00
  • Save $249.00 Save $0.00
    $849.00
    $849.00 - $849.00
    $849.00
    $600.00
    $600.00 - $600.00
    $600.00

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

    Astro-Tech
    In Stock

    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
    $849.00 - $849.00
    $849.00
    $600.00
    $600.00 - $600.00
    $600.00
    Save $249.00 Save $0.00
  • $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

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