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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. AG Optical 16" Imaging Harmer Wynne Astrograph

    AG Optical - 16" Imaging Harmer Wynne Astrograph

    Imaging Harmer Wynne (iHW) astrographs are high resolution, fast focal ratio instruments with excellent on and off axis performance.

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    FREE SHIPPING
    (48 States)
    Model#: iHW16
    $27,595.00

  2. Camera NOT included!!!

    Borg - 71FL Fluorite Optical Tube - Series 80 Set

    Series 80 set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6171
    $1,150.00

  3. Explore Scientific 102mm f/7 ED Apochromatic Triplet Essential Refractor Telescope

    Explore Scientific - ED102mm f/7 Classic White "Essential Series" Air-Spaced Triplet Refractor *

    The Explore Scientific 102mm f/7 Air-Spaced Triplet ED APO Telescope made Wired Magazine''s Wish List for cool gifts and is a perfect instrument for demanding wide field observing and astrophotography.

    Explore Scientific Instruction Booklet for Triplet Refractors

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    (48 States)
    Model#: ES-ED10207-01
    $999.99

  4. AG Optical 14" Imaging Harmer Wynne Astrograph

    AG Optical - 14" Imaging Harmer Wynne Astrograph

    Imaging Harmer Wynne (iHW) astrographs are high resolution, fast focal ratio instruments with excellent on and off axis performance.

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    (48 States)
    Model#: iHW14
    $23,975.00

  5. Vixen ED100Sf 100mm (3.9 inch) ED Apochromatic Refractor Optical Tube Assembly

    Vixen - ED100Sf 100mm (3.9 inch) ED Apochromatic Refractor Optical Tube Assembly*

    The Vixen ED100Sf 100mm ED Apochromatic Refractor includes Extra-Low Dispersion glass that reduces aberration to create sharp images.

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    (48 States)
    Model#: 2618
    $699.00

  6. Celestron - 6" Newtonian Reflector Optical Tube Assembly

    Celestron - 6" Newtonian Reflector Optical Tube Assembly

    .....reflector optical tubes are also lightweight for their size. An aluminum optical housing not only minimizes flexure and helps equalize the temperature inside the tube, it also reduces..... ... Learn More
    Model#: 32054-OTA

    Regular Price: $269.00

    Special Price: $179.00

  7. Orion ShortTube 80-T Refractor Telescope

    Orion - ShortTube 80-T Refractor Telescope

    The Orion ShortTube 80-T Optical Tube assembly is an f/5 multi-coated 400mm refractor that provides excellent wide field of views with excellent contrast for viewing planets.

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    Model#: 09946
    $189.10

  8. Bresser Messier AR-127S/635 Optical Tube Assembly

    Bresser - Messier AR-127S/635 Optical Tube Assembly

    The Bresser Messier AR-127S/635 127mm refractor is excellent for touring the solar system! Planets like Jupiter and Saturn will show cloud bands, moons, and even Saturn's rings with just the use of this telescope. Closer to Earth, the moon's craters and surface geological features will all become visible.

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    (48 States)
    Model#: BR-27635
    $519.00

  9. Bresser Messier AR-102/1000 Optical Tube Assembly

    Bresser - Messier AR-102/1000 Optical Tube Assembly

    The Bresser Messier AR-102/1000 Refractor OTA is capable of showing many details in celestial objects like Saturn's rings, Jupiter's cloud bands as well as craters on the moon.

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    (48 States)
    Model#: BR-02100
    $369.00

  10. Bresser - Messier AR-80/900 Optical Tube with EQ Sky Mount and Tripod

    Bresser - Messier AR-80/900 Optical Tube with EQ Sky Mount and Tripod

    The Bresser Messsier AR-80/900 is an excellent scope for beginners due to its remarkable light gathering power for better detailed observation.

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    (48 States)
    Model#: BR-80900
    $209.00

  11. Explore Scientific 210mm f/3.8 White Aluminum Photo Newtonian Reflector

    Explore Scientific - 210mm f/3.8 White Aluminum Tube Newtonian Reflector

    The Explore Scientific 210mm White Aluminum Photo Newtonian Reflector has a very fast focal ratio and large aperture making it suitable well for ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: PN21038-HRCC
    $499.99

  12. Sky-Watcher USA Esprit 150mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 150mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11430
    $6,399.00

  13. Sky-Watcher USA Esprit 120mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 120mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11420
    $3,199.00

  14. Sky-Watcher USA Esprit 100mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 100mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11410
    $2,499.00

  15. Sky-Watcher USA - Esprit 80mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 80mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11400
    $1,649.00

  16. 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

    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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    (48 States)
    Model#: ED0806-01
    $699.99

  17. Borg - 71FL Fluorite Optical Tube - Fork Mount Set with Tripod

    Borg - 71FL Fluorite Optical Tube - Fork Mount Set with Tripod

    Fork mount set for the Borg 71FL Fluorite Optical Tube with Tripod.

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    (48 States)
    Model#: 0271S
    $1,730.00

  18. PrimaLuceLab AIRY 150mm Triplet Apochromatic Refractor

    PrimaLuceLab - AIRY 150mm Triplet Apochromatic Refractor

    Call it "The Boss"! The PrimaLuceLab's  larger diameter apochromatic refractor optical tube comes with an extraordinary lens, air spaced apochromatic triplet, with 150mm diameter, an excellent value for an apochromatic refractor! Thanks to FPL-53 lens, AIRY APO150T offers a perfect chromatic correction and great performances for all the applications, both visual and photographic.

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    (48 States)
    Model#: APO150T
    $9,299.00

  19. Hutech Black BORG 77ED Optical Tube

    Hutech - Black BORG 77ED Optical Tube

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    (48 States)
    Model#: 6183
    $1,450.00

  20. Takahashi FSQ106EDXIIII Astrograph Telescope

    Takahashi - FSQ106EDXIIII Astrograph Telescope

    The Takahashi FSQ106EDXIIII is the the new FSQ-EDX4 version of the FSQ. The design was changed to allow the larger CCA-250 CAA to be used for greater rigidity.

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    (48 States)
    Model#: FQK0106NUEX4
    $5,150.00

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