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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 8" Quattro Imaging Newtonian Reflector Optical Tube Assembly

    Sky-Watcher USA - 8" Quattro Imaging Newtonian Reflector Optical Tube Assembly

    The Sky-Watcher Quattro Imaging Newtonian telescope with dual speed focuser includes an outstanding mirror-set and a 2" dual-speed 10:1 ratio focuser for precision focusing for optimal performance

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    (48 States)
    Model#: S11210
    $610.00

  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

    Explore Scientific Instruction Booklet for Triplet Refractors

    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#: ED0806-01
    Explore Scientific AstroCats Promo (ends July 18, 2015)!

    Regular Price: $729.99

    Special Price: $679.99

  3. Vixen ED100Sf 100mm (3.9 inch) ED Apochromatic Refractor Optical Tube Assembly

    Vixen - ED100Sf 100mm (3.9 inch) ED Apochromatic Refractor Optical Tube Assembly

    The Vixen ED100Sf 100mm ED Apochromatic Refractor includes Extra-Low Dispersion glass that reduces aberration to create sharp images.

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    (48 States)
    Model#: 2618
    $699.00

  4. Sky-Watcher USA 150mm Maksutov-Cassegrain Optical Tube Assembly

    Sky-Watcher USA - 150mm Maksutov-Cassegrain Optical Tube Assembly

    The Sky-Watcher Maksutov-Cassegrains are the ultimate take-anywhere telescopes. Despite their small dimensions they pack a powerful punch.

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    (48 States)
    Model#: S11530
    $750.00

  5. Sky-Watcher USA 10" Quattro Imaging Newtonian Reflector Optical Tube Assembly

    Sky-Watcher USA - 10" Quattro Imaging Newtonian Reflector Optical Tube Assembly

    The Sky-Watcher Quattro Imaging Newtonian telescope with dual speed focuser includes an outstanding mirror-set and a 2" dual-speed 10:1 ratio focuser for precision focusing for optimal performance

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    (48 States)
    Model#: S11220
    $770.00

  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. 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
    Sky-Watcher USA Sizzling Summer Savings ends July 31, 2015!
    $649.00

  8. 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
    Sky-Watcher USA Sizzling Summer Savings ends July 31, 2015!
    $749.00

  9. 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
    Explore Scientific AstroCats Promo (ends July 18, 2015)!

    Regular Price: $749.99

    Special Price: $699.99

  10. Celestron - C8-A XLT (CG-5) 8" Optical Tube Assembly (OTA) - 91020XLT

    Celestron - C8-A XLT (CG-5) 8" Optical Tube Assembly (OTA) - 91020XLT

    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: $839.95

  11. 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

  12. 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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    Model#: LE102OTA
    $729.00

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