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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. 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
    $1,965.00

  2. Borg - 300mm/F4.5 Fluorite Telephoto Lens Set (White) - *Picture shows camera. This product does NOT include the camera, it only includes the optical tube assembly components.

    Borg - 300mm/F4.5 Fluorite Telephoto Lens Set (White)

    300mm/F4.5 Fluorite Telephoto Lens Set (white) includes 2567, 7861, 7603, 2 x 7602, and 7000

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    (48 States)
    Model#: 6267
    $995.00

  3. Borg 71FL Series 80 Set Black (Camera NOT Included)

    Borg - 71FL Series 80 Set Black

    2572 - 71FL Fluorite Objective Assembly (black)

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    (48 States)
    Model#: 6170
    $1,095.00

  4. Takahashi FC-100DL 100m f/9 Apochromatic Refractor

    Takahashi - FC-100DL 100mm f/9 Apochromatic Refractor Optical Tube Assembly

    Takahashi’s new FC-100DL fluorite apochromat is a new addition to the lightweight FC line of telescopes.

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    (48 States)
    Model#: TFK10210
    HURRY!! IN STOCK! ONLY 1 LEFT!
    $2,249.00

  5. PlaneWave 12.5" CDK Corrected Dall-Kirkham Carbon Fiber Telescope

    PlaneWave - 12.5" CDK12.5 Corrected Dall-Kirkham Carbon Fiber Telescope - Fully Warranted - OPEN BOX

    The new CDK optical design is the innovative solution for unsurpassed astroimaging quality at an affordable price.

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    Model#: 125101-OPEN
    $9,995.95

  6. Celestron EdgeHD 800 Optical Tube Assembly

    Celestron - EdgeHD 800 8" Optical Tube Assembly (OTA) - Fully Warranted - OPEN BOX

    The EdgeHD optical system takes all of the compact power popularized by the SCT and combines it with an improved high definition optical system for wide field, astrograph quality images.

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    Model#: 91030-XLT-OPEN

    Regular Price: $1,299.00

    Special Price: $1,259.00

  7. 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
    $1,999.99

  8. Bresser 8" f/3.9 Newtonian Reflector Optical Tube Assembly

    Bresser - 8" f/3.9 Newtonian Reflector Optical Tube Assembly

    Designed for enhanced astrophotography and imaging performance, the Bresser 8" f/3.9 Reflector Telescope has a shortened focal length versus conventional scopes with a similar aperture to produce a fast f/3.9 focal ratio - translating to shorter exposure times.

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    (48 States)
    Model#: BR-N20839
    $499.99

  9. Explore Scientific ED80mm f/6 Classic White "Essential Series" Air-Spaced Triplet Refractor

    Explore Scientific - ED80mm f/6 Classic White "Essential Series" Air-Spaced Triplet Refractor - Fully Warranted - OPEN BOX

    Explore Scientific Instruction Booklet for Triplet Refractors

    This 80mm f/6 ED Apochromatic triplet is an air-spaced triplet refractor telescope for observing and photography of celestial objects. Instrument utilizing Hoya ED glass, comes equipped with a 99% dielectric-coated 2-inch diagonal. Case, Finder Scope and Mount NOT included.

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    Model#: ED0806-01-OPEN
    $589.00

  10. Celestron EdgeHD 925 9.25" Optical Tube Assembly (OTA) - DEMO

    Celestron - EdgeHD 925 9.25" Optical Tube Assembly (OTA) - Fully Warranted - OPEN BOX

    The Celestron EdgeHD 925 catadioptric optical tube includes state of the art EdgeHD optical coatings to reduce the effect of coma, which is a major advantage for visual astronomy when adding the StarBright XLT coatings which increase light transmission.

    NOTE: This is a demo version.

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    (48 States)
    Model#: 91040-XLT-OPEN

    Regular Price: $2,299.00

    Special Price: $2,199.00

  11. Hutech - 89ED OTA (black)

    Hutech - 89ED OTA (black)

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    (48 States)
    Model#: 6187
    $1,450.00

  12. Hutech 90FL Black BORG BU-1 Set

    Hutech - 90FL Black BORG BU-1 Set

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    (48 States)
    Model#: 6190
    $2,480.00

  13. PrimaLuceLab AIRY 120mm Doublet Apochromatic Refractor

    PrimaLuceLab - AIRY 120mm Doublet Apochromatic Refractor

    Individuals searching for maximum quality in an apochromatic refractor don't want to compromise on anything: large diameter optics, excellent chromatic aberration correction, high-end mechanics, and remarkable focuser are key.

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    (48 States)
    Model#: APO120
    $2,999.00

  14.  PrimaLuceLab AIRY 104mm Triplet Apochromatic Refractor

    PrimaLuceLab - AIRY 104mm Triplet Apochromatic Refractor

    PrimaLuceLab is glad to present the first OTA of the new T-series which is designed for the customer thriving for excellent optical performances with good mechanical quality with no compromises!

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    (48 States)
    Model#: APO104T
    $3,299.00

  15. PrimaLuceLab AIRY ED100 Doublet Apochromatic Refractor

    PrimaLuceLab - AIRY ED100 Doublet Apochromatic Refractor

    Usually large diameter and high quality apochromatic refractors are expensive. The new AIRY ED100 is an exception to this rule by offering the fabulous optical quality of 100mm diameter FPL-51 doublet ED lens, exceptional 2.7" focuser and an incredible mechanics made with CNC machine at an affordable price.

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    (48 States)
    Model#: ED100
    $1,750.00

  16. PrimaLuceLab AIRY Black 90T 90mm Triplet Apochromatic Refractor

    PrimaLuceLab - AIRY Black 90T 90mm Triplet Apochromatic Refractor

    An excellent refractor for those searching for a great quality lens with the best design and parts, all in one item yet compact, lightweight and highly portable.

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    (48 States)
    Model#: BLACK-90T
    $1,850.99

  17. PrimaLuceLab AIRY ED90 Doublet Apochromatic Refractor

    PrimaLuceLab - AIRY ED90 Doublet Apochromatic Refractor

    An apochromatic refractor with a remarkable diameter and high mechanical quality at an unbelievable cost to the customer!

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    (48 States)
    Model#: ED90
    $1,299.00

  18. PrimaLuceLab AIRY 80mm Doublet Apochromatic Refractor

    PrimaLuceLab - AIRY 80mm Doublet Apochromatic Refractor

    PrimaLuceLab has designed the AIRY APO80 Refractor's Optical force, mechanical quality and configuration highlights at the highest levels while keeping it all in a compact and transportable design and offering the telescope at a very low price to the customer!

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    (48 States)
    Model#: APO80
    $999.00

  19. PrimaLuceLab AIRY ED72 Doublet Apochromatic Refractor

    PrimaLuceLab - AIRY ED72 Doublet Apochromatic Refractor

    High-performance optics, highest level mechanics and incredible value all in a minimal, lightweight and versatile item that can be utilized both as travel telescope (even on photographic tripod) or as wide field astro-imaging apochromatic telescope.

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    (48 States)
    Model#: ED72
    $699.95

  20. PrimaLuceLab AIRY 65mm Quadriplet Apochromatic Refractor

    PrimaLuceLab - AIRY 65mm Quadriplet Apochromatic Refractor with Field Flattener

    AIRY APO65F is a little and compact apochromatic refractor tube with 65mm diameter and 420mm focal length making it excellent for taking long exposures due to its quadruplet optics (FPL - 53)

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    (48 States)
    Model#: APO65F
    $999.95

Items 61 to 80 of 229 total

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