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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. APM 100mm 45° ED-APO Binoculars with Interchangeable Eyepieces

    Lunt Engineering - 100mm 45° ED-APO Binoculars with Interchangeable Eyepieces

    This binocular is made for very high power use up to above 100 power.

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    (48 States)
    Model#: APM100ED-BINO
    $2,950.00

  2. 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

  3. Borg - 71FL Fluorite Optical Tube - Fork Mount Set

    Borg - 71FL Fluorite Optical Tube - Fork Mount Set

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

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    (48 States)
    Model#: 0271
    $1,450.00

  4. Tripod is NOT included!!!!

    Borg - 71FL Fluorite Optical Tube - Astro Visual Set

    Astro Visual set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6272
    $1,175.00

  5. Camera is NOT Included!!!!!

    Borg - 71FL Fluorite Optical Tube - Telephoto Set

    Telephoto set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6271
    $1,195.00

  6. Camera is NOT Included!!!

    Borg - 71FL Fluorite Optical Tube - Basic Set

    Basic set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6071
    $1,150.00

  7. Borg - 60mm ED f/5.8 (350mm FL) Optical Tube

    Borg - 60mm ED f/5.8 (350mm FL) Optical Tube

    Mini Borg scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block (left), or in an available finder bracket.

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    (48 States)
    Model#: 6260
    $575.00

  8. Borg - 60mm ED f/5.4 (325mm FL) Achromat

    Borg - 60mm ED f/5.4 (325mm FL) Achromat

    Mini Borg scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block (left), or in an available finder bracket.

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    (48 States)
    Model#: 6161
    $299.00

  9. Borg 50mm F5 Achromat

    Borg - 50mm F5 Achromat

    Mini Borg scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block (left), or in an available finder bracket.

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    (48 States)
    Model#: 6150
    $215.00

  10. Borg - Mini Borg 45EDII F7.2

    Borg - Mini Borg 45EDII F7.2

    Mini Borg scopes are compatible with a wide variety of standard Borg back-end accessories:

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    (48 States)
    Model#: 6045
    $375.00

  11. 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

  12. AG Optical 12.5" Imaging Harmer Wynne Astrograph

    AG Optical - 12.5" 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#: iHW12.5
    $15,775.00

  13. Vixen 140mm NA140SSf f/5.7 Neo Achromat Optical Tube Assembly Newer Model

    Vixen - 140mm NA140SSf (f/5.7) Neo Achromat Optical Tube Assembly - Newer Model

    Weighing in at 14.3 lbs this 5.5 inch Vixen telescope is an incredible performer. Deep Sky objects are easily visible and Astro-Imagers looking for a fast instrument with clear aperture will be impressed with the NA140’s performance.

    Now with the 2 Speed focuser,  flip mirror , 7x50 FinderScope and Tube Rings complete

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    (48 States)
    Model#: 58681

    Regular Price: $1,999.00

    Special Price: $1,499.00

  14. Vixen Ultra Fast Astrograph VSD 100 f/3.8 Optical Tube Assembly

    Vixen - Ultra Fast Astrograph VSD 100 f/3.8 Optical Tube Assembly

    The innovative wide and flat imaging field, that covers 645 medium format cameras, and e 5 elements in 5 group lens design completely eliminates a violet tint in chromatic aberration (blue halo).

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    (48 States)
    Model#: VSD
    $6,299.00

  15. 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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    (48 States)
    Model#: TFK10110
    $2,595.00

  16. PlaneWave - Infrared Dall-Kirkham Optical Tube Assembly 20"

    PlaneWave - Infrared Dall-Kirkham Optical Tube Assembly 20"

    This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths.  It is diffraction limited across a 20mm image circle at the focal plane.

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    Model#: IR DK20
    $35,000.00

  17. PlaneWave - Infrared Dall-Kirkham Optical Tube Assembly 17"

    PlaneWave - Infrared Dall-Kirkham Optical Tube Assembly 17"

    This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths.  It is diffraction limited across a 20mm image circle at the focal plane.

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    Model#: IR DK17
    $24,000.00

  18. PlaneWave - Infrared Dall-Kirkham Optical Tube Assembly 12.5"

    PlaneWave - Infrared Dall-Kirkham Optical Tube Assembly 12.5"

    This is a Dall-Kirkham optical design with coatings that are optimized to transmit in infrared wavelengths.  It is diffraction limited across a 20mm image circle at the focal plane.

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    Model#: IR DK12.5
    $13,800.00

  19. PlaneWave 14" CDK Corrected Dall-Kirkham Carbon Fiber Telescope

    PlaneWave - 14" CDK Corrected Dall-Kirkham Carbon Fiber Telescope

    The PlaneWave Instruments CDK14 is a 14 inch (0.36 m) f/7.2 Corrected Dall-Kirkham Astrograph telescope. The CDK14 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism.

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    Model#: 140101
    $15,000.00

  20. PlaneWave 0.7m CDK Corrected Dall-Kirkham Telescope

    PlaneWave - 0.7m CDK Corrected Dall-Kirkham Telescope

    PlaneWave Instruments now brings a fully automated observatory class telescope to the market in the CDK700, a 0.7 meter, Alt-Az telescope system.

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    Model#: 700101
    $200,000.00

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