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

  2. Opticstar - "Optimum One" Series - ED80S Gold 80mm ED Fluorite Doublet Refractor with SL-131C Colour Planetary Camera

    Opticstar - "Optimum One" Series - ED80S Gold 80mm ED Fluorite Doublet Refractor with SL-131C Colour Planetary Camera

    The Opticstar ED80S short-tube refractor is ideal as a portable scope and can be used for observing, imaging or as a guide scope.

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    (48 States)
    Model#: ED80S + SL-131C

    Regular Price: $998.00

    Special Price: $948.10

  3. Opticstar - "Optimum One" Series - ED80S Gold + PL-131M Monochrome Planetary Camera

    Opticstar - "Optimum One" Series - ED80S Gold + PL-131M Monochrome Planetary Camera

    The Opticstar ED80S short-tube refractor is ideal as a portable scope and can be used for observing, imaging or as a guide scope. It uses a high quality 80mm apochromatic doublet that is fully broad-band multicoated to ensure maximum light transmission.

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    Model#: ED80S + PL-131M

    Regular Price: $1,148.00

    Special Price: $1,090.60

  4. Opticstar Optimum One ED80S Gold OTA with PX-35C Planetary Camera - Color

    Opticstar - "Optimum One" Series - ED80S Gold + PX-35C Colour Planetary Camera

    The Opticstar ED80S short-tube refractor is ideal as a portable scope and can be used for observing, imaging or as a guide scope. It uses a high quality 80mm apochromatic doublet that is fully broad-band multicoated to ensure maximum light transmission.

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    Model#: ED80S + PX-35C

    Regular Price: $1,098.00

    Special Price: $1,043.10

  5. Takahashi Epsilon 130D Astrograph

    Takahashi - Epsilon 130D Astrograph

    Takahashi introduced their Epsilon Series flat-field hyperbolic astrographs in the middle 1980’s. The Epsilon-130 was the smallest aperture and most portable of the series. Now Takahashi is re-introducing the new ε-130D digital version of this astrograph.

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    (48 States)
    Model#: TEK1310
    $2,995.00

  6. Borg Series 45 Optical Tube - White

    Borg - Series 45 Optical Tube - White

    The Borg Series 45 telescopes are based around a 45mm diameter tube and the 42mm/P1 thread used on the popular M42 photographic system.

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    (48 States)
    Model#: 6036
    $315.00

  7. Borg Series 45 Optical Tube Black

    Borg - Series 45 Optical Tube - Black

    The Borg Series 45 telescopes are based around a 45mm diameter tube and the 42mm/P1 thread used on the popular M42 photographic system.

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    Model#: 6037
    $335.00

  8. 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

  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 - 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

  11. 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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    Model#: 6260
    $575.00

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

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    (48 States)
    Model#: PN21038-HRCC
    $2,000.99

  20. Celestron C8-A XLT (CG-5) Optical Tube Assembly

    Celestron - C8-A XLT (CG-5) Optical Tube Assembly

    There are three major components that make up the Star Bright XLT high transmission optical system design

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    (48 States)
    Model#: 91020-XLT

    Regular Price: $1,049.00

    Special Price: $849.00

Items 61 to 80 of 158 total

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