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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. Explore Scientific ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed and manufactured by Hoya Optical of Japan.

    Explore Scientific Instruction Booklet for Triplet Refractors

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    (48 States)
    Model#: EDT-10207-CF

    In Stock

    $1,499.99

  2. Explore Scientific ED80 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED80 Air Spaced Carbon Fiber Triplet Refractor Telescope

    This 80mm f/6 ED Apochromatic triplet is an air-spaced triplet refractor telescope for observing and photography of celestial objects.

    Explore Scientific Instruction Booklet for Triplet Refractors

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    (48 States)
    Model#: EDT-0806-CF

    Available - Ships in 2-4 Days

    $999.99

  3. Takahashi Mewlon 250CRS Dall-Kirkham OTA

    Takahashi - Mewlon 250CRS Dall-Kirkham Optical Tube Assembly

    When Takahashi developed the Mewlon Correctors it meant any Mewlon-250 or 300 ever made could be converted into a flat field corrected telescope.

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    (48 States)
    Model#: TLK2502

    Available - Ships in 2-4 Days

    $9,420.00

  4. Takahashi - Mewlon 300CRS Dall-Kirkham Optical Tube Assembly

    Takahashi - Mewlon 300CRS Dall-Kirkham Optical Tube Assembly

    Dall-Kirkham Telescopes by world-renowned TakahashiJapan© combines refractor-like performance in a larger folded optic reflector design. ... Learn More
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    (48 States)
    Model#: TLK3502

    Available - Ships in 2-4 Days

    $17,410.00

  5. Opticstar AR90S Gold DS 90mm f/5.5 Apochromat Refractor OTA

    Opticstar - AR90S Gold DS 90mm f/5.5 Achromat Refractor Optical Tube Assembly

    The Opticstar AR90S Gold Dual Speed 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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    Model#: OSRAR90S5GD

    Available - Ships in 2-4 Days

    $436.05

  6. Opticstar AR80S Gold DS 80mm f/5 Apochromat Refractor Optical Tube Assembly

    Opticstar - AR80S Gold DS 80mm f/5 Apochromat Refractor Optical Tube Assembly

    The Opticstar AR80S Gold Dual Speed 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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    Model#: OSRAR80SGD

    Available - Ships in 2-4 Days

    $379.05

  7. Opticstar AR80S Gold DS 80mm f/5 Apochromat Refractor Guidescope

    Opticstar - AR80S Gold 80mm f/5 Achromatic Refractor Guidescope with Rings, Dovetail, and Crayford Focuser

    The AR80S Guidescope kit consists of the Opticstar AR80S telescope, set of collimating rings and Vixen type dovetail to mount the telescope to standard mount saddles as found on the Sky-Watchers, Celestron CG-5, Vixen and other mounts.

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    Model#: OSRAR80SGS

    Available - Ships in 2-4 Days

    $379.05

  8. 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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    Model#: ED80S + SL-131C

    Available - Ships in 2-4 Days

    Regular Price: $998.00

    Special Price: $948.10

  9. 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.

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    Model#: ED80S + PL-131M

    Available - Ships in 2-4 Days

    Regular Price: $1,148.00

    Special Price: $1,090.60

  10. 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.

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    Model#: ED80S + PX-35C

    Available - Ships in 2-4 Days

    Regular Price: $1,098.00

    Special Price: $1,043.10

  11. 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#: TEK1300

    In Stock

    $3,030.00

  12. 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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    Model#: 0271

    Available - Ships in 2-4 Days

    $1,450.00

  13. 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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    Model#: 0271S

    Available - Ships in 2-4 Days

    $1,730.00

  14. 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

    This item is special order. Delivery times will vary. Place your order today and your card will not be charged until the item ships.

    $27,595.00

  15. 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

    This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.

    $200,000.00

  16. 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

    This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.

    $15,000.00

  17. 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

    This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.

    $13,800.00

  18. 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

    This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.

    $24,000.00

  19. 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

    This item typically has a delivery time of 8-12 weeks. Place your order today to reserve.

    $35,000.00

  20. 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

    In Stock

    $2,440.00

Items 81 to 100 of 235 total

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