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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. Sky-Watcher USA - ProED 80mm Doublet APO Refractor

    Sky-Watcher USA - ProED 80mm Doublet APO Refractor

    Due to their unobstructed textbook-like diffraction patterns and exotic optical properties, the ED-APO produces the sharpest, highest quality imaging obtainable from any telescope optical design.

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    (48 States)
    Model#: S11100
    $649.00

  2. 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

  3. 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

  4. 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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    Model#: TSA0102
    $3,350.00

  5. Takahashi Epsilon 180ED f/2.8 Hyperbolic Flat-Field Astrograph Optical Tube Assembly

    Takahashi - Epsilon 180ED f/2.8 Hyperbolic Flat-Field Astrograph OTA

    The Takahashi Epsilon-180ED (D=180mm, F/2.8), based on catadioptric telescope design (means association of lenses and mirrors) offers a fundamental innovation compared with Newton reflector or Schmidt astrograph.

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    Model#: TEK0180
    $5,510.00

  6. Takahashi FS-60C OTA

    Takahashi - FS-60CB 60mm (f/5.9) Fluorite Refractor Optical Tube Assembly

    Are you looking for an extreme high quality refractor telescope to serve across a variety of purposes? Then look no more... Takahashi has your answer with the FS-60CB Fluorite Refractor

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    (48 States)
    Model#: TFK6004
    $860.00

  7. Takahashi TOA-150 Optical Tube Assembly

    Takahashi - TOA-150B Refractor Optical Tube Assembly

    The TOA-150 is the second Takahashi Ortho Apochromat to be developed by Takahashi. It features a newly designed triplet objective. This new design like its smaller companion the TOA-130 is absolutely color free

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    Model#: TOK1501
    $11,870.00

  8. Takahashi Mewlon 210 Dall-Kirkham OTA

    Takahashi - Mewlon 210 Dall-Kirkham Optical Tube Assembly

    Dall-Kirkham Telescope combines refractor-like performance in a larger folded optic reflector design. The Takahashi Mewlon 210 at prime focus provides a focal length of 2415mm, focal ratio of f/11.5 and image circle of 18mm

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    (48 States)
    Model#: TLK2101
    $3,670.00

  9. Mewlon 250 OTA

    Takahashi - Mewlon 250 Dall-Kirkham OTA - (BRC-250 Double Ring Tube Holder)

    The Mewlon combines refractor-like performance in a larger folded optic reflector design.The 250 optical tube assembly has 9.8" of aperture and a focal ratio of 12.

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    Model#: TLK2501
    $7,895.00

  10. TeleVue 85mm f/7 Refractor Kit Brass

    TeleVue - 85mm f/7 Refractor Kit - Brass

    Televue TV-85 (Complete) APO Refractor - Brass?  The Televue TV-85 is a superb travel scope, measuring only 21.5" (546mm) in length and weighing 9.6 lbs.?  23.6" (600mm) focal length combined with 3

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    (48 States)
    Model#: BXC-3370

    Regular Price: $3,295.00

    Special Price: $2,395.00

  11. TeleVue - NP-127is Imaging System

    TeleVue - NP-127is Imaging System

    CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the challenge, and with the proper tweaks would be extraordinary tools for the imager

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    Model#: NPI-5053
    $6,985.00

  12. TeleVue - 60 Spotting Scope PACKAGE

    TeleVue - 60 Spotting Scope PACKAGE

    TELEVUE 60 PACKAGE INCLUDES:* TeleVue 60 Scope OTA* Custom fitted carry bag* 45 degree Image Erecting Prism* 8-24mm (15-45x) Zoom* 5mm Nagler Type 6 (72x)* Qwik-Point finder

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    Model#: TSP-2460
    $1,474.00

  13. TeleVue - TV-60 OTA   60mm, f/6, APO (Doublet) Refractor.

    TeleVue - TV-60 OTA 60mm, f/6, APO (Doublet) Refractor.

    Tele Vue-60 OTA 60mm, f/6, APO (Doublet) Refractor.

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    Model#: TVO-2460

    Regular Price: $1,195.00

    Special Price: $795.00

  14. TeleVue - 76 Complete 76mm, f/6.3, APO (Doublet) Refractor- Ivory

    TeleVue - 76 Complete 76mm, f/6.3, APO (Doublet) Refractor- Ivory

    Complete Includes: Custom soft case, Screw-on lens cover, Sliding dew shield, Plossl eyepiece, 2" focuser, 2" diagonal, 1 1/4" adapter, Ivory Powdercoat finish or Evergreen Powercoat

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    (48 States)
    Model#: WXC-3063
    $1,725.00

  15. TeleVue - 85 Complete 85mm, f/7, APO (Doublet) Refractor - Ivory

    TeleVue - 85 Complete 85mm, f/7, APO (Doublet) Refractor - Ivory

    Televue TV-85 Complete APO Refractor - Ivory?  The Televue TV-85 is a superb travel scope, measuring only 21.5" (546mm) in length and weighing 8 lbs.?  23.6" (600mm) focal length combined with 3

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    (48 States)
    Model#: WXC-3370
    $2,495.00

  16. TeleVue - NP-127is 127mm, f/5.2 APO (Nagler-Petzval) Refractor - Imaging/Visual

    TeleVue - NP-127is 127mm, f/5.2 APO (Nagler-Petzval) Refractor - Imaging/Visual

    Both the optical and mechanical designs have been revised to reduce atmospheric defocusing sensitivity (visually the difference is virtually indiscernible)

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    Model#: NPI-5054

    Regular Price: $8,995.00

    Special Price: $6,895.00

  17. TeleVue - NP-101is 101mm, f/5.4 APO (Nagler-Petzval) Refractor - Imaging/Visual

    TeleVue - NP-101is 101mm, f/5.4 APO (Nagler-Petzval) Refractor - Imaging/Visual

    CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the challenge, and with the proper tweaks would be extraordinary tools for the imager.

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    (48 States)
    Model#: NPI-4057

    Regular Price: $5,800.00

    Special Price: $3,795.00

  18. Vixen A70Lf OTA

    Vixen - 70mm A70Lf (f/12.9) Achromatic Refractor Optical Tube Assembly*

    The A70Lf, although inexpensive, is not a toy telescope. Many amateurs begin with and enjoy countless hours under the stars with this instrument It has the same quality glass and exacting workmanship that goes into our much larger instruments

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    Model#: 2602
    30% sale while supplies last!

    Regular Price: $139.00

    Special Price: $97.99

  19. Vixen - 110mm VMC110L (f/9.4) Modified Cassegrain Optical Tube Assembly

    Vixen - 110mm VMC110L (f/9.4) Modified Cassegrain Optical Tube Assembly

    One of the best multi purpose Grab and Go Reflector Telescopes. This is a compact optical tube, with features found on our higher end telescopes.

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    (48 States)
    Model#: 26052
    10% Off While Supplies Last!

    Regular Price: $299.00

    Special Price: $269.00

  20. Vixen - 103mm ED103S (f/7.7) ED Apochromatic Refractor Optical Tube Assembly

    Vixen - 103mm ED103S (f/7.7) ED Apochromatic Refractor Optical Tube Assembly

    The newly designed high definition ED lens in Vixen's ED103S Refractor gives excellent optical performance in a short optical tube for easy handling.

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    (48 States)
    Model#: 5865
    10% off while supplies last!

    Regular Price: $1,799.00

    Special Price: $1,619.00

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