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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. 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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    Model#: BR-90900

    Regular Price: $440.99

    Special Price: $299.00

  2. 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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    Model#: BR-80900

    Regular Price: $313.99

    Special Price: $209.00

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

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

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

    Starts shipping approximately late August.

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    Model#: PN21038-HRCC

    Regular Price: $2,000.99

    Special Price: $899.99

  4. 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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    Model#: S11430
    $6,399.00

  5. 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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    Model#: S11420
    $3,199.00

  6. Takahashi - FC-100DF Steinheil Fluorite Doublet Apochromat Optical Tube Assembly - Imaging Model

    Takahashi - FC-100DF Steinheil Fluorite Doublet Apochromat Optical Tube Assembly - Imaging Model

    Takahshi has just introduced an updated version of the original FC-100 now called the FC-100D. It has been designed for the digital age.

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    Model#: TFK10110
    $2,595.00

  7. Astro-Tech Green 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    Astro-Tech - Green 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    This green optical tube from Astro-Tech is a piece of equipment every advanced serious astronomer should consider. With high quality refractive optics, fabulous accessories, it is pretty amazing.

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    Model#: AT72GR
    $379.00

  8. Sky-Watcher USA ProED 120mm Doublet APO Refractor

    Sky-Watcher USA - ProED 120mm Doublet APO Refractor

    Sky-Watcher high-performance ED-APO refractors offer premium optical performance for the discriminating amateur astronomer.

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    Model#: S11130
    $1,549.00

  9. 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

  10. 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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    Model#: CC14.5
    $24,900.00

  11. 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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    Model#: CC12.5
    $19,900.00

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

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

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    Model#: RC24
    $83,900.00

  14. RC20

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

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    Model#: RC20
    $58,900.00

  15. RC16

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

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

  16. 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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    (48 States)
    Model#: RC14.5
    $24,900.00

  17. 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

  18. 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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    (48 States)
    Model#: CC24
    $83,900.00

  19. Orion - 80mm f/11.4 Refractor Telescope Optical Tube

    Orion - 80mm f/11.4 Refractor Telescope Optical Tube

    * Ideal for use as a guide scope * Guiding enables long exposure astrophotography * 1.25" focuser * One-year limited warrantyThis quality Orion 80mm F/11 ... Learn More
    Model#: 07380
    $126.95

  20. Sky-Watcher USA ProED 100mm Doublet APO Refractor

    Sky-Watcher USA - ProED 100mm Doublet APO Refractor

    Sky-Watcher is a leader in the design and manufacturer of ED-APO systems.  Sky-Watcher offers one of the most extensive lines of ED-APOCHROMATIC refractors in the world.

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    (48 States)
    Model#: S11120
    $749.00

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