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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. 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

  2. Stellarvue 102mm APO Triplet Refractor

    Stellarvue - SVR102T 102mm f/7 APO Triplet CF Refractor - 3" Feathertouch Focuser

    The SVR102T is a 102mm APO triplet refractor by Stellarvue, with a f/7 focal ration and premium optics. Includes an interferometric test report and features a carbon fiber body for reduced temperature fluctuation, 3" precision dual speed FeatherTouch focuser, and padded carry case. ... Learn More
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    (48 States)
    Model#: SVR102T-3FT

    Available - Typically ships in 1-3 Days

    $2,895.00

  3. Stellarvue 102mm APO Triplet Refractor

    Stellarvue - SVR102T 102mm f/7 APO Triplet Carbon Fiber Refractor

    The SVR102T is a 102mm APO triplet refractor by Stellarvue, with a f/7 focal ration and premium optics. Includes an interferometric test report and features a carbon fiber body for reduced temperature fluctuation, 2.5" rotating Stellarvue focuser, and padded carry case. ... Learn More
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    Model#: SVR102T-25SV

    Available - Typically ships in 1-3 Days

    $2,395.00

  4. Stellarvue 130mm APO Triplet Refractor

    Stellarvue - SVA130T 130mm f/7 APO Triplet Refractor w/ 3" FeatherTouch Focuser

    Stellarvue's 130mm SVA103EDT f/7 Triplet APO refractor features a FeatherTouch 3" dual speed precision focuser, and includes a 2-1.25" adapter, dual hinged rings, an American made hard case. Interferometric test report included for proof of optic specifications. Add a 2" dielectric diagonal at a reduced price! ... Learn More
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    (48 States)
    Model#: SVA130T-3FT

    Available - Typically ships in 1-3 Days

    $3,995.00

  5. Stellarvue 130mm APO Triplet Refractor

    Stellarvue - SVA130T 130mm f/7 APO Triplet Refractor

    Stellarvue's 130mm SVA103EDT f/7 Triplet APO refractor features a Stellarvue rotating 2.5" dual speed focuser, and includes a 2-1.25" adapter, dual hinged rings, an American made hard case. Interferometric test report included for proof of optic specifications. Add a 2" dielectric diagonal at a reduced price! ... Learn More
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    (48 States)
    Model#: SVA130T-25SV

    Available - Typically ships in 1-3 Days

    $3,495.00

  6. Stellarvue SV80ST 80mm f/6 APO Triplet Refractor

    Stellarvue - SV80ST 80mm f/6 APO Triplet Refractor - 2.5" Feather Touch Focuser

    Stellarvue's SV80ST 80mm triplet refractor features apochromatic optics for crisp, color perfect views. 2.5" Feathertouch rack and pinion focuser with 1.25" reducing adapter. Add a Stellarvue 2" dielectric diagonal at a reduced price! ... Learn More
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    Model#: SV080ST-25FT

    Available - Typically ships in 1-3 Days

    Regular Price: $1,695.00

    Special Price: $1,595.00

  7. Stellarvue SV80ST 80mm f/6 APO Triplet Refractor

    Stellarvue - SV80ST 80mm f/6 APO Triplet Refractor

    Stellarvue's SV80ST 80mm triplet refractor features apochromatic optics for crisp, beautiful views. F/6 focal ratio offer short exposure times making this 80mm refractor an imager's dream. 2.5" Stellarvue rack and pinion focuser with 1.25" reducing adapter. Add a Stellarvue 2" dielectric diagonal at a reduced price! ... Learn More
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    Model#: SV080ST-25SV

    Available - Typically ships in 1-3 Days

    $1,295.00

  8. Stellarvue SV70T 70mm f/6 APO Triplet Refractor

    Stellarvue - SV70T 70mm f/6 APO Triplet Refractor Telescope

    The Stellarvue 70mm f/6 APO Refractor is a triplet telescope with premium FPL-53 optics with beautiful high contrast and chroma free images. Features a dual speed Stellarvue focuser with 2" and 1.25" compression ring adapters, dual tube rings, and an airline case. Add an optional 2" dielectric diagonal for a reduced price! ... Learn More
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    (48 States)
    Model#: SV070T-25SV

    Available - Typically ships in 1-3 Days

    $799.00

  9. Stellarvue Access 80mm f/7 Super ED APO Refractor

    Stellarvue - Access 80mm f/7 Super ED APO Refractor

    The Stellarvue Super 80 is an 80mm f/7 refractor with FPL53 and Lanthanum optics. Features a Stellarvue 2.5" rack and pinion precision focuser. Add an optional 2" dielectric diagonal at a reduced price! ... Learn More
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    Model#: SV080A-25SV

    In Stock

    $699.00

  10. 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

    Available - Ships in 2-4 Days

    $649.00

  11. Sky-Watcher USA ProED 120mm Doublet APO Refractor

    Sky-Watcher USA - ProED 120mm Doublet APO Refractor

    Sky-Watcher high-performance ED-APO refractors offer premium optical performance for the discriminating amateur astronomer.

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    (48 States)
    Model#: S11130

    Available - Ships in 2-4 Days

    $1,549.00

  12. 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

    In Stock

    $749.00

  13. Sky-Watcher USA - Esprit 80mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 80mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11400

    Available - Ships in 2-4 Days

    $1,649.00

  14. Sky-Watcher USA Esprit 150mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 150mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11430

    Available - Ships in 2-4 Days

    $6,399.00

  15. Sky-Watcher USA Esprit 120mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 120mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11420

    In Stock

    $3,199.00

  16. Sky-Watcher USA Esprit 100mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 100mm ED Triplet APO Refractor

    Designed wtih the discerning astrophotographer in mind, Sky-Watcher USA’s top-of-the-line Esprit refractors deliver the kind of imaging performance one would expect from telescopes costing thousands of dollars more.

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    (48 States)
    Model#: S11410

    Available - Ships in 2-4 Days

    $2,499.00

  17. Sky-Watcher USA 90mm Maksutov-Cassegrain Optical Tube Assembly

    Sky-Watcher USA - 90mm 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#: S11500

    Available - Ships in 2-4 Days

    $255.00

  18. 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

    Available - Ships in 2-4 Days

    $610.00

  19. Sky-Watcher USA 190mm Maksutov-Newtonian Optical Tube Assembly

    Sky-Watcher USA - 190mm Maksutov-Newtonian Optical Tube Assembly

    The exciting new Mak-Newtonian from Sky-Watcher is just what astrophotographers and serious visual observers have been looking for.

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    (48 States)
    Model#: s11550

    In Stock

    $1,500.00

  20. Sky-Watcher USA 180mm Maksutov-Cassegrain Optical Tube Assembly

    Sky-Watcher USA - 180mm 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#: S11540

    In Stock

    $1,275.00

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