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Optical Tube Assemblies

Optical tube assemblies, commonly abbreviated by astronomers as OTAs are simply the tube of the telescope where the optics are internally located. OTAs can be helpful in a situation in which an observer has a compatible mount and doesn't want to buy a whole new telescope with a mount included. Optical Tube Assemblies can come in the form of Maksutov-Cassegrain, Astrographs, Reflectors, Refractors, Schmidt-Cassegrains and many others! With the right mounting connections and range of mount and tripod payload, OTAs are a great choice for changing optical type without changing the mount.

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  1. Explore Scientific - ED127 Classic White f/7.5 Air Spaced Triplet with Hoya FCD100 Optics and 2.5" HEX Focuser

    Explore Scientific - ED127 Classic White f/7.5 Air Spaced Triplet with Hoya FCD100 Optics and 2.5" HEX Focuser

    The Explore Scientific 127mm f/7.5 FCD100 APO Refractor features the Explore Scientific HEX 2.5" focuser capable of carrying up to 10 pounds, premium Hoya FCD100 optical glass and EMD coatings on all optical surfaces housed in an aluminum optical tube. Includes rings, and Vixen style dovetail. ... Learn More
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    Model#: FCD100-127075-01

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    $1,999.99

  2. Celestron - C11-A XLT  (CGE) 11" Optical Tube Assembly (OTA)

    Celestron - C11-A XLT (CGE) 11" Optical Tube Assembly (OTA)

    Celestron C-11A OTA with Starbright XLT.

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    Model#: CEL-91036-XLT

    In Stock

    $1,945.95

  3. Meade 115mm Series 6000 ED Triplet APO (f/7) OTA

    Meade - 115mm Series 6000 ED Triplet APO (f/7) OTA

    Meade 115mm ED Triplet APO Refractor #4507-00-05. For crisp wide field observing and imaging, nothing can beat a true triple-element Apochromatic Refractor (APO)

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    Model#: MEA-4507-00-05

    In Stock

    $1,999.00

  4. Meade - 10" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Meade - 10" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Building on Meade’s award-winning Advanced Coma-Free (ACF) optics, the 12" OTA employs a fast f/8 optical system with high-contrast baffling that insures crisp, pinpoint imaging to the very edge of the field

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    Model#: MEA-1008-80-01

    In Stock

    Save until October 31st!

    Regular Price: $2,199.00

    Special Price: $1,979.00

  5. Explore Scientific - ED127 APO Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED127 APO Air Spaced Carbon Fiber Triplet Refractor Telescope

    The Explore Scientific 127mm f/7.5 Air-Spaced Triplet ED APO produces a visual experience that is often compared to much larger aperture reflector telescopes.

    Explore Scientific Instruction Booklet for Triplet Refractors

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    (48 States)
    Model#: EDT-127075-CF

    In Stock

    $1,999.99

  6. DayStar Filters SolaREDi 66mm Dedicated Solar Telescope Chromosphere

    DayStar Filters - SolaREDi 66mm Dedicated Solar Telescope Chromosphere

    The DayStar Instrument SolaREDi 66 Solar Telescope is a state of the art designed solar instrument specifically targeted for observing Hydrogen Alpha wavelength with the 2.3X telecentric barlow lens.

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    Model#: DSR66C

    Available - Ships in 2-4 Days

    $1,995.00

  7. DayStar Filters SolaREDi 66mm Dedicated Solar Telescope Prominence

    DayStar Filters - SolaREDi 66mm Dedicated Solar Telescope Prominence

    The DayStar Instrument SolaREDi 66 Solar Telescope is a state of the art designed solar instrument specifically targeted for observing Hydrogen Alpha wavelength with the 2.3X telecentric barlow lens.

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    Model#: DSR66P

    Available - Ships in 2-4 Days

    $1,995.00

  8. Explore Scientific ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope with Bresser EXOS2GT Mount

    Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed and manufactured by Hoya Optical of Japan.

    This German Equatorial mount is equipped with motors on both axes, allowing the mount to track astronomical objects accurately. The precision gears allow operation with a minimum of backlash on all nine slewing speeds.

    Explore Scientific Instruction Booklet for Triplet Refractors

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    (48 States)
    Model#: EDT10207CF-EXOS2GT

    Available - Ships in 2-4 Days

    $1,999.99

  9. Borg 90FL Optical Tube Assembly (Black) - camera is NOT Included

    Borg - 90FL Optical Tube Assembly (Black)

    This 90 Flourite from Borg package comes with seven components.

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    (48 States)
    Model#: 6291

    Available - Ships in 2-4 Days

    $1,965.00

  10. Explore Scientific - ED127 APO Carbon Fiber Triplet Refractor Telescope w/ Flattener

    Explore Scientific - ED127 APO Carbon Fiber Triplet Refractor Telescope w/ Flattener

    Special Buy! Get a 127mm APO Carbon Fiber Triplet Refractor with a 2" Field Flattener for just $1999! A savings of $150 off standard retail! This is NEW product but discontinued product. Full manufacturer warranty included. Quantity limited. 

    The Explore Scientific 127mm f/7.5 Air-Spaced Triplet ED APO produces a visual experience that is often compared to much larger aperture reflector telescopes.

    ...
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    (48 States)
    Model#: EDT-127075CF-FF2

    In Stock

    Regular Price: $2,148.99

    Special Price: $1,999.99

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