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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. Celestron C11-A XLT (CG-5) Optical Tube Assembly

    Celestron - C11-A XLT (CG-5) 11" Optical Tube Assembly

    Schmidt-Cassegrain optical tubes like the Celestron C11-A XLT have unique features that set them aside from pure reflectors and refractors.

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    (48 States)
    Model#: CEL-91067-XLT
    $1,745.95

  2. Meade 10" LX200-ACF Optical Tube Assembly

    Meade - 10" LX200-ACF f/10 Advanced Coma-Free OTA

    Picture yourself sitting in your friend Bill's backyard, with your other colleagues and friends Janice, Frank,  Sue and Zeak. All of you have come together to commemorate Earth Hour

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    (48 States)
    Model#: MEA-1010-60-01
    $1,699.00

  3. Orion Premium 190mm F/5.3 Mak-Newt Astrograph Telescope OTA

    Orion - Premium 190mm F/5.3 Mak-Newt Astrograph Telescope OTA

    As one of our satisfied customers put it, the Orion 190mm Maksutov-Newtonian Astrograph Telescope gives "BIG APO Refractor-like performance at 1/3 the cost", not to mention the savings over smaller premium astrographs.

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    Model#: ORI-09978
    $1,599.99

  4. 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
    $1,549.00

  5. TeleVue - 76 Complete 76mm, f/6.3, APO (Doublet) Refractor- Ivory

    TeleVue - 76 Complete 76mm, f/6.3, APO (Doublet) Refractor- Ivory

    Complete Includes: Custom soft case, Screw-on lens cover, Sliding dew shield, Plossl eyepiece, 2" focuser, 2" diagonal, 1 1/4" adapter, Ivory Powdercoat finish or Evergreen Powercoat

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    (48 States)
    Model#: WXC-3063
    $1,725.00

  6. Vixen - 103mm ED103S (f/7.7) ED Apochromatic Refractor Optical Tube Assembly

    Vixen - 103mm ED103S (f/7.7) ED Apochromatic Refractor Optical Tube Assembly

    The newly designed high definition ED lens in Vixen's ED103S Refractor gives excellent optical performance in a short optical tube for easy handling.

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    (48 States)
    Model#: 5865
    27% sale while supplies last!

    Regular Price: $2,199.00

    Special Price: $1,595.00

  7. 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

  8. 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
    $1,649.00

  9. 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
    $1,500.00

  10. Orion EON 115mm ED Triplet Apochromatic Refractor Telescope

    Orion - EON 115mm ED Triplet Apochromatic Refractor Telescope

    The Orion EON 115mm ED Triplet Refractor as a well affordable priced wide field instrument, excellent for astrophotographers who strive for a true-color instrument.

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    Model#: ORI-10087
    $1,799.99

  11. PrimaLuceLab AIRY ED90 Doublet Apochromatic Refractor

    PrimaLuce Lab - AIRY ED90 Doublet Apochromatic Refractor

    PrimaLuce Lab ED90 is a 90mm refractor telescope featuring apochromatic doublet optics and premium grade mechanics. With a great combination of ample aperture and a compact design, the AIRY 90mm is very portable and serves well as both a visual and imaging telescope. Includes 2" hybrid focuser with 2" on axis lock adapter, retractible dew shield, PLUS system dual scope rings, and a hard carry case. ... Learn More

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    (48 States)
    Model#: AIRYED90
    $1,749.00

  12. 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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    (48 States)
    Model#: SV080ST-25FT
    $1,695.00

  13. Meade 8" LX200-ACF (f/10) Advanced Coma-Free OTA (UHTC)

    Meade - 8" LX200-ACF f/10 Advanced Coma-Free OTA - (UHTC) - OPEN BOX

    Meade now brings to market a sophisticated Catadioptric optical design favored by research facilities worldwide at a price many enthusiasts can afford.  Most professional applications are this style telescope or a gargantuan apochromatic refractor.

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    (48 States)
    Model#: MEA-0810-60-01-OPEN

    Regular Price: $1,699.00

    Special Price: $1,599.00

    Out of stock

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