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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 NexStar 6SE Optical Tube Assembly

    Celestron - NexStar 6SE Optical Tube Assembly

    Portability and serious performance come together in the NexStar 6 SE. The ultra portable 6 SE features a precision optical system with 1500mm focal length (f/10) and offers 44% more light gathering than a 5" telescope.

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    (48 States)
    Model#: 11068-OTA
    $389.95

  2. 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

  3. Celestron - 6" Newtonian Reflector Optical Tube Assembly

    Celestron - 6" Newtonian Reflector Optical Tube Assembly

    The Celestron Advanced VX 6" Newtonian Telescope is excellent for basic deep sky observing as well as planetary observing due to its impressive light gathering power of the mirrors and mid fast focal ratio.

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    Model#: 32054-OTA

    Regular Price: $269.00

    Special Price: $179.00

  4. 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

    Regular Price: $179.99

    Special Price: $149.99

  5. 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

    Regular Price: $869.99

    Special Price: $519.00

  6. Celestron - Rowe-Ackermann Schmidt Astrograph OTA

    Celestron - Rowe-Ackermann Schmidt Astrograph OTA

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    Model#: Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly
    $3,499.00

  7. 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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    Model#: BR-02100

    Regular Price: $606.99

    Special Price: $369.00

  8. Bresser Messier AR-90/900 Optical Tube with EXOS-1 EQ Mount and Tripod

    Bresser - Messier AR-90/900 Optical Tube with EXOS-1 EQ Mount and Tripod

    With a light gathering power of 200x more than the human eye, the Bresser Messier AR-90/900 is an excellent telescope for beginner astronomers that still want to detailed views delivered. Details in Saturn's rings, storms on Jupiter, moon craters and even the seasons of Mars are all apparent through this telescope.

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    (48 States)
    Model#: BR-90900

    Regular Price: $440.99

    Special Price: $299.00

  9. Lunt Engineering - 152mm f/7.9 ED APO Refractor

    Lunt Engineering - 152mm f/7.9 ED APO Refractor

    A 6" f/7.9 ED with the glass combination Chengdu CDGM FK61 and Lanthanum H-LAF53.

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    Model#: APM-152-1200-FK61/LA-D-2.5ZTA
    $3,990.00

  10. Takahashi TSA-102S 102mm Triplet Super APO Refractor Optical Tube Assembly

    Takahashi - TSA-102S 102mm Triplet Super APO Refractor Optical Tube Assembly

    The TSA-10S2 is the first in the new TSA line of Takahashi triplet apochromats. The color free images produced will delight the lunar, planetary and deep sky observer with very high contract images with pin point stars.

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    (48 States)
    Model#: TSA0102
    $3,350.00

  11. Optical Guidance Systems - Classic Cassegrain 20 " f/8.1 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 20 " f/8.1 - Optical Tube Assembly

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    (48 States)
    Model#: CC20
    $58,900.00

  12. Optical Guidance Systems - Classic Cassegrain 16 " f/8.4 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 16 " f/8.4 - Optical Tube Assembly

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    Model#: CC16
    $37,900.00

  13. Optical Guidance Systems - Classic Cassegrain 14.5 " f/7.9 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 14.5 " f/7.9 - Optical Tube Assembly

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    (48 States)
    Model#: CC14.5
    $24,900.00

  14. Optical Guidance Systems - Classic Cassegrain 12.5 " f/9 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 12.5 " f/9 - Optical Tube Assembly

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    (48 States)
    Model#: CC12.5
    $19,900.00

  15. Optical Guidance Systems - Classic Cassegrain 10 " f/9 Truss or closed tube - Optical Tube Assembly
  16. RC24

    Optical Guidance Systems - Ritchey-Chretien 24 " f/8 - Optical Tube Assembly

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    (48 States)
    Model#: RC24
    $83,900.00

  17. RC20

    Optical Guidance Systems - Ritchey-Chretien 20 " f/8.1 - Optical Tube Assembly

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    (48 States)
    Model#: RC20
    $58,900.00

  18. RC16

    Optical Guidance Systems - Ritchey-Chretien 16 " f/8.4 - Optical Tube Assembly

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    (48 States)
    Model#: RC16
    $37,900.00

  19. Optical Guidance Systems - Ritchey-Chretien 14.5 " f/7.9 - Optical Tube Assembly

    Optical Guidance Systems - Ritchey-Chretien 14.5 " f/7.9 - Optical Tube Assembly

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    FREE SHIPPING
    (48 States)
    Model#: RC14.5
    $24,900.00

  20. Optical Guidance Systems - Classic Cassegrain 24 " f/8 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 24 " f/8 - Optical Tube Assembly

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    FREE SHIPPING
    (48 States)
    Model#: CC24
    $83,900.00

Items 81 to 100 of 178 total

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