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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.

Items 41 to 60 of 178 total

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  1. DIAGONAL NOT INCLUDED

    Lunt Engineering - 102mm ED Doublet OTA

    A new optical tube by Lunt, the 102mm ED Doublet! With a slow focal ratio of f/7, this optical tube is an excellent choice for observation of the moon, sun, and planets. When using solar filter, this telescope is great for sun observing!

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    FREE SHIPPING
    (48 States)
    Model#: LE102OTA
    $729.00

  2. Explore Scientific ED80mm f/6 Classic White "Essential Series" Air-Spaced Triplet Refractor

    Explore Scientific - ED80mm f/6 Classic White "Essential Series" Air-Spaced Triplet Refractor

    This 80mm f/6 ED Apochromatic triplet is an air-spaced triplet refractor telescope for observing and photography of celestial objects. Instrument utilizing Hoya ED glass, comes equipped with a 99% dielectric-coated 2-inch diagonal. Case, Finder Scope and Mount NOT included.

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    (48 States)
    Model#: ES-ED0806-01

    Regular Price: $1,622.99

    Special Price: $729.99

  3. 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

  4. Meade - 80mm Series 5000 ED APO OTA and Series 5000 2 " Enhanced Diagonal

    DISCONTINUED: Meade - 80mm Series 5000 ED APO OTA and Series 5000 2 " Enhanced Diagonal

    This is a discontinued item. We recommend the Meade 6000 80mm OTA as a replacement.

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    (48 States)
    Model#: 1306-00-02
  5. Opticstar ED80S Gold 80mm ED Fluorite Doublet Refractor OTA

    Opticstar - ED80S Gold 80mm ED Fluorite Doublet Refractor Optical Tube Assembly

    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#: OSRED80S6

    Regular Price: $799.00

    Special Price: $759.05

  6. 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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    (48 States)
    Model#: TVO-2460

    Regular Price: $1,195.00

    Special Price: $795.00

  7. 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

  8. Explore Scientific - 152mm f/6.5 Achromatic Optical Tube Assembly

    Explore Scientific - 152mm f/6.5 Achromatic Optical Tube Assembly

    The AR152 (six-inch), with its larger aperture optics gathers 44% more light over the AR127 (five-inch) model, providing much brighter images and higher resolution

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    (48 States)
    Model#: DAR152065-01

    Regular Price: $1,889.99

    Special Price: $849.99

  9. Explore Scientific - 80mm Air-Spaced Triplet ED Refractor Telescope

    DISCONTINUED: Explore Scientific - 80mm Air-Spaced Triplet ED Refractor Telescope

    This is a discontinued item. Check out the newer version of the ED80 from Explore Scientific as a replacement.

    The 80mm f/6 ED Apochromatic triplet from Explore Scientific is a great air-spaced triplet refractor telescope for observing as well as for use in photography of celestial objects.

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    FREE SHIPPING
    (48 States)
    Model#: TED0806-00
  10. Borg - 45 ED II f/5 Astrograph Set (6045 + 7857 + 7885)

    Borg - 45 ED II f/5 Astrograph Set (6045 + 7857 + 7885)

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    (48 States)
    Model#: B04561
    $850.00

  11. Canadian Telescopes - 152mm Air Spaced Achromat Refractor OTA

    DISCONTINUED: Canadian Telescopes - 152mm Air Spaced Achromat Refractor OTA

    Superb air spaced doublet optics, well baffled tube and deluxe 3 inch 1:10 double speed focuser came together to make this valuable 6 inch f:5.9 telescope.

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    Model#: CT41529
  12. 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

    Regular Price: $2,000.99

    Special Price: $899.99

  13. 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

  14. Explore Scientific - 152mm f/4.8 Comet Hunter OTA with Deluxe Case and Accessories

    DISCONTINUED: Explore Scientific - 152mm f/4.8 Comet Hunter OTA with Deluxe Case and Accessories

    This is a discontinued item. We recommend the MN06048CF-04 optical system as a replacement.

    The David H. Levy Comet Hunter is a rich field telescope (RFT), capable of showing faint objects over a wide field of view (generally two degrees or more).

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    (48 States)
    Model#: MN06048CF-00
  15. Explore Scientific ED102 Classic White "Essential Series" Air Spaced Triplet Apochromatic Telescope

    DISCONTINUED: Explore Scientific - ED102 Classic White "Essential Series" Air Spaced Triplet Apochromatic Telescope

    This is a discontinued item. We recommend the newer version of the 102mm f/7 ED Apochromatic Refractor from Explore Scientific as a replacement.

    The Explore Scientific 80mm f/6 Air-Spaced Triplet ED APO telescope made Wired Magazine's Wish List for cool gifts and is a perfect instrument for demanding wide field observing and astrophotography.

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    FREE SHIPPING
    (48 States)
    Model#: ES-ED10207-00
  16. Explore Scientific - David H. Levy Comet Hunter f/4.8 Carbon Fiber Maksutov Newtonian Optical Tube Assembly

    DISCONTINUED: Explore Scientific - David H. Levy Comet Hunter f/4.8 Carbon Fiber Maksutov Newtonian Optical Tube Assembly

    This is a discontinued item. We recommend the newer version of the Explore Scientific David H. Levy Comet Hunter 152mm Carbon Fiber OTA as a replacement.

    The Explore Scientific David H. Levy Comet Hunter is the result of a dream collaboration between long-time amateur astronomer & Explore Scientific founder, Scott Roberts, and one of his life-long heroes, David H. Levy. NOTE: Case, Finder Scope and Eyepiece NOT Included with this package

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    (48 States)
    Model#: MN06048CF-03
  17. Explore Scientific - 102mm Air-Spaced Triplet ED Refractor Telescope

    DISCONTINUED: Explore Scientific - 102mm Air-Spaced Triplet ED Refractor Telescope

    This is a discontinued product. We recommend the Explore Scientific 102mm ED Apochromatic Refractor as a replacement. 

    This 102mm f/7 telescope from Explore Scientific is an air-spaced triplet ED APO refractor that utilizes Hoya ED glass. The telescope is equipped with a 99% dielectric-coated 2-inch diagonal as well as a 8x50 viewfinder making it easy to search for celestial objects. A case with a foam insert is also included with the telescope.

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    FREE SHIPPING
    (48 States)
    Model#: TED10207-00
  18. Vixen - 200mm VMC200L (f/9.75) Catadioptrical Reflector Optical Tube Assembly

    Vixen - 200mm VMC200L (f/9.75) Catadioptrical Reflector Optical Tube Assembly

    The VMC200L is a unique catadioptric optical system. It incorporates a primary mirror and a meniscus corrector just before a secondary mirror. By doing so, light is corrected twice on the optical path.

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    (48 States)
    Model#: 5829
    10% off while supplies last!

    Regular Price: $1,199.00

    Special Price: $1,025.00

  19. Celestron C8-A XLT (CGE) Optical Tube Assembly

    Celestron - C8-A XLT (CGE) Optical Tube Assembly

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

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    FREE SHIPPING
    (48 States)
    Model#: 91024-XLT
    $1,039.00

  20. 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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    (48 States)
    Model#: ED80S + PX-35C

    Regular Price: $1,098.00

    Special Price: $1,043.10

Items 41 to 60 of 178 total

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