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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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  • Original price $519.00 - Original price $519.00
    Original price
    $519.00
    $519.00 - $519.00
    Current price $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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    Original price $519.00 - Original price $519.00
    Original price
    $519.00
    $519.00 - $519.00
    Current price $519.00
  • Original price $419.00 - Original price $419.00
    Original price
    $419.00
    $419.00 - $419.00
    Current price $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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    Original price $419.00 - Original price $419.00
    Original price
    $419.00
    $419.00 - $419.00
    Current price $419.00
  • Original price $439.00 - Original price $439.00
    Original price
    $439.00
    $439.00 - $439.00
    Current price $439.00

    Astro-Tech AT80ED 3.1" f/7 ED Refractor OTA

    Astro-Tech
    In Stock

    This Astro-Tech AT80ED refractor has: 80mm f/7 fully multicoated doublet optics using FK-61 ED glass dual-speed 2" Rack and Pinion rotatable focus...

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    Original price $439.00 - Original price $439.00
    Original price
    $439.00
    $439.00 - $439.00
    Current price $439.00
  • Original price $649.00 - Original price $649.00
    Original price
    $649.00
    $649.00 - $649.00
    Current price $649.00

    Astro-Tech AT102ED 4" f/7 ED Refractor OTA

    Astro-Tech
    In Stock

    The Astro-Tech AT102ED is a fantastic value and incredible performer. This Astro-Tech AT102ED refractor has: • 102mm f/7 fully multicoated doublet ...

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    Original price $649.00 - Original price $649.00
    Original price
    $649.00
    $649.00 - $649.00
    Current price $649.00
  • Original price $0.00 - Original price $0.00
    Original price $0.00
    $899.00
    $899.00 - $899.00
    Current price $899.00

    Astro-Tech AT80EDT f/6 ED Triplet Refractor OTA

    Astro-Tech
    More on the way

    For the backyard grab-and-go observer, for the Milky Way star field scanner, for the wide field imager, for the birder and terrestrial photographer...

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    Original price $0.00 - Original price $0.00
    Original price $0.00
    $899.00
    $899.00 - $899.00
    Current price $899.00
  • Original price $329.00 - Original price $329.00
    Original price
    $329.00
    $329.00 - $329.00
    Current price $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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    Original price $329.00 - Original price $329.00
    Original price
    $329.00
    $329.00 - $329.00
    Current price $329.00
  • Original price $1,199.00 - Original price $1,199.00
    Original price
    $1,199.00
    $1,199.00 - $1,199.00
    Current price $1,199.00

    Astro-Tech AT102EDL Refractor OTA FCD-100 and Lanthanum f/7 Doublet

    Astro-Tech
    In Stock

    The Astro-Tech AT102EDL takes the performance of the it smaller siblings and combines it with the mechanics of the EDT line. This Astro-Tech ED ref...

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    Original price $1,199.00 - Original price $1,199.00
    Original price
    $1,199.00
    $1,199.00 - $1,199.00
    Current price $1,199.00
  • Original price $849.00
    Original price $849.00 - Original price $849.00
    Original price $849.00
    Current price $600.00
    $600.00 - $600.00
    Current price $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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    Original price $849.00
    Original price $849.00 - Original price $849.00
    Original price $849.00
    Current price $600.00
    $600.00 - $600.00
    Current price $600.00
    Save $249.00 Save $0.00
  • Original price $1,849.00 - Original price $1,849.00
    Original price
    $1,849.00
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    Current price $1,849.00

    Astro-Tech AT125EDL Refractor OTA FCD-100 and Lanthanum f/7.8 Doublet

    Astro-Tech
    In Stock

    The Astro-Tech AT125EDL takes the performance of the it smaller siblings and combines it with the mechanics of the EDT line. This Astro-Tech ED ref...

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    Original price $1,849.00 - Original price $1,849.00
    Original price
    $1,849.00
    $1,849.00 - $1,849.00
    Current price $1,849.00
  • Original price $1,595.00 - Original price $1,595.00
    Original price
    $1,595.00
    $1,595.00 - $1,595.00
    Current price $1,595.00

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

    Astro-Tech
    In Stock

      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 pini...

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    Original price $1,595.00 - Original price $1,595.00
    Original price
    $1,595.00
    $1,595.00 - $1,595.00
    Current price $1,595.00
  • Original price $4,395.00 - Original price $4,395.00
    Original price
    $4,395.00
    $4,395.00 - $4,395.00
    Current price $4,395.00

    Astro-Tech AT152EDT f/8 Triplet APO Refractor OTA

    Astro-Tech
    More on the way

    The Astro-Tech AT152EDT 152mm f/8 Triplet Apochromatic Refractor – A True Lifetime Telescope  For those who demand the best in optical performance ...

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    Original price $4,395.00 - Original price $4,395.00
    Original price
    $4,395.00
    $4,395.00 - $4,395.00
    Current price $4,395.00
  • Original price $999.00 - Original price $999.00
    Original price
    $999.00
    $999.00 - $999.00
    Current price $999.00

    Celestron 6" f/8 Achromatic Doublet Refractor Optical Tube, CG5/AVX Dovetail

    Celestron
    More on the way

    Here's a sensational value - a big 6" (150mm) achromatic refractor optical tube that's priced like other manufacturers' 80mm scopes.  This Celestro...

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    Original price $999.00 - Original price $999.00
    Original price
    $999.00
    $999.00 - $999.00
    Current price $999.00
  • Original price $839.95 - Original price $839.95
    Original price
    $839.95
    $839.95 - $839.95
    Current price $839.95

    Celestron 6" SCT Optical Tube, CG5/AVX Dovetail

    Celestron
    More on the way

    This 6" SCT optical tube has advanced Starbright XLT multicoatings for Celestron's brightest images ever. The Celestron C8 was the first Schmidt-Ca...

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    Original price $839.95 - Original price $839.95
    Original price
    $839.95
    $839.95 - $839.95
    Current price $839.95
  • Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $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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    Original price $1,499.00 - Original price $1,499.00
    Original price
    $1,499.00
    $1,499.00 - $1,499.00
    Current price $1,499.00
  • Original price $3,499.00 - Original price $3,499.00
    Original price
    $3,499.00
    $3,499.00 - $3,499.00
    Current price $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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    Original price $3,499.00 - Original price $3,499.00
    Original price
    $3,499.00
    $3,499.00 - $3,499.00
    Current price $3,499.00

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