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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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  • $899.00 - $899.00
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    ZWO FF65 APO Refractor 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 high-performance 65mm f/6.4 astrograph designed for ...

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    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00
  • Sold out
    $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
    Sold Out

    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
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    $3,499.99
    Sold out
  • $2,167.00 - $2,167.00
    $2,167.00
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    TeleVue TV-85 3.35" (85mm) f/7 Evergreen Tube/Black Trim APO Refractor OTA

    TeleVue
    More on the way

    The TV-85 has a 2" dual-speed rack and pinion focuser with a brass non-marring clamp ring to hold star diagonals and accessories in place. It comes...

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    $2,167.00 - $2,167.00
    $2,167.00
    $2,167.00 - $2,167.00
    $2,167.00
  • $1,734.00 - $1,734.00
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    TeleVue TV-76 3" (76mm) f/6.3 Ivory Tube/Black Trim APO Refractor OTA

    TeleVue
    More on the way

    This TeleVue TV-76 refractor has out of this world optics in a very compact 14.5" long body. It's small enough and light enough to take anywhere wi...

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    $1,734.00 - $1,734.00
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  • $2,570.00 - $2,570.00
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    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
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    $1,199.00
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    $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
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    $1,199.00
    Save $500.00 Save $0.00
  • $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
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    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
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  • 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
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    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
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  • $2,340.00 - $2,340.00
    $2,340.00
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    $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
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    $2,340.00
  • FSQ-85ED "Baby Q" 3.35" F/5.3 dual ED/four element design
    $4,280.00 - $4,280.00
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    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
  • $1,999.00 - $1,999.00
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    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
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  • $1,499.00 - $1,499.00
    $1,499.00
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    $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
  • $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
  • NP127Is 5" f/5.2 Nagler-Petzval apochromatic refractor
    $7,373.00 - $7,373.00
    $7,373.00
    $7,373.00 - $7,373.00
    $7,373.00

    TeleVue NP127Is 5" f/5.2 Nagler-Petzval Apochromatic Refractor

    TeleVue
    More on the way

    The original Hot Product TeleVue NP-127is has long been regarded as one of the finest optical systems available for both visual observing and imagi...

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    $7,373.00 - $7,373.00
    $7,373.00
    $7,373.00 - $7,373.00
    $7,373.00
  • $1,039.00 - $1,039.00
    $1,039.00
    $1,039.00 - $1,039.00
    $1,039.00

    Sky Rover 80 GPS 80mm f/6 Super ED Triplet APO PRO Refractor OTA

    Sky Rover
    More on the way

    Eighty millimeters is the aperture where a refractor stops being a novelty and starts being a real telescope. The Sky Rover 80 GPS takes that thres...

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    $1,039.00 - $1,039.00
    $1,039.00
    $1,039.00 - $1,039.00
    $1,039.00
  • $2,010.00 - $2,010.00
    $2,010.00
    $2,010.00 - $2,010.00
    $2,010.00

    Takahashi FC-76DS Refractor Telescope

    Takahashi
    More on the way

    The Takahashi FC-76DS is an updated version of the beloved Takahashi from 1980.  The fluorite doublet will truly take you back to the future. Like ...

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    $2,010.00 - $2,010.00
    $2,010.00
    $2,010.00 - $2,010.00
    $2,010.00
  • $1,300.00 - $1,300.00
    $1,300.00
    $1,300.00 - $1,300.00
    $1,300.00

    Takahashi FC-76DCU Refractor Telescope

    Takahashi
    More on the way

    Relive the 80's with this updated version of a Takahashi Classic, the Takahashi FC-76DCU. Like the FS series, the FC series are apochromatic refrac...

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    $1,300.00 - $1,300.00
    $1,300.00
    $1,300.00 - $1,300.00
    $1,300.00
  • $1,734.00 - $1,734.00
    $1,734.00
    $1,734.00 - $1,734.00
    $1,734.00

    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
    $1,734.00
    $1,734.00 - $1,734.00
    $1,734.00
  • $859.00 - $859.00
    $859.00
    $859.00 - $859.00
    $859.00

    Sky Rover 70 GPS 70mm f/6 Super ED Triplet APO PRO Refractor OTA

    Sky Rover
    More on the way

    A triplet apochromat at 70mm might seem like overkill — until you point it at a star field and see what three elements can do that two cannot. The ...

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    $859.00 - $859.00
    $859.00
    $859.00 - $859.00
    $859.00
  • Sky Rover 80GPA
    Sky Rover 80GPA
    $749.00 - $749.00
    $749.00
    $749.00 - $749.00
    $749.00

    Sky Rover 80 GPA 80mm f/7 Super ED Doublet APO Refractor OTA

    Sky Rover
    More on the way

    In some astronomer's eyes, eighty millimeters is where a telescope stops being a novelty and starts being an instrument. A good 80mm refractor reso...

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    $749.00 - $749.00
    $749.00
    $749.00 - $749.00
    $749.00
  • $519.00 - $519.00
    $519.00
    $519.00 - $519.00
    $519.00

    Sky Rover 72 GPA 72mm f/6 Super ED Doublet APO Refractor OTA

    Sky Rover
    More on the way

    The 72mm aperture class has become one of the most popular in amateur astronomy — and for good reason. It's the sweet spot where portability meets ...

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    $519.00 - $519.00
    $519.00
    $519.00 - $519.00
    $519.00
  • $849.00 - $849.00
    $849.00
    $849.00 - $849.00
    $849.00

    Astro-Tech AT66EDQ f/7 ED Quadruplet Apochromatic Refractor OTA

    Astro-Tech
    More on the way

    Astro-Tech AT66EDQ f/7 ED Quadruplet Apochromatic Refractor Wide-field astrophotography has one persistent problem: flat fields are hard. Most refr...

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    $849.00 - $849.00
    $849.00
    $849.00 - $849.00
    $849.00

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