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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. Celestron C11-A XLT (CG-5) Optical Tube Assembly

    Celestron - C11-A XLT (CG-5) 11" Optical Tube Assembly

    Schmidt-Cassegrain optical tubes like the Celestron C11-A XLT have unique features that set them aside from pure reflectors and refractors.

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    (48 States)
    Model#: 91067-XLT
    $1,895.00

  2.  Borg - 77 ED II f/4.3 Astrograph Set (2178 + 7135 + 7835 + 7704)

    Borg - 77 ED II f/4.3 Astrograph Set (2178 + 7135 + 7835 + 7704)

    • BORG 77EDII OTA
    • 0.65x reducer
    • Total of 6 elements
    • 330mm focal length
    • F4.3
    • 35mm full-frame coverage
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    (48 States)
    Model#: B07743
    $2,088.00

  3. Explore Scientific - ED127 APO Air Spaced Carbon Fiber Triplet Refractor Telescope* Discontinued SKU

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

    IN STOCK

    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

    Regular Price: $2,499.99

    Special Price: $1,905.07

  4. 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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    (48 States)
    Model#: 4507-00-05
    $1,999.00

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

    Explore Scientific - ED127 Air-Spaced Triplet Refractor Carbon Fiber Telescope* Discontinued SKU

    IN STOCK

    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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    FREE SHIPPING
    (48 States)
    Model#: TED127075-CF

    Regular Price: $2,499.99

    Special Price: $1,905.07

5 Item(s)

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