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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 102mm f/7 ED Apochromatic Triplet Essential Refractor Telescope

    Explore Scientific - ED102mm f/7 Classic White "Essential Series" Air-Spaced Triplet Refractor *

    The Explore Scientific 102mm f/7 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.

    Explore Scientific Instruction Booklet for Triplet Refractors

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    (48 States)
    Model#: ES-ED10207-01
    $1,249.99

  2. Opticstar Optimum One ED80S Gold OTA with PX-75C Planetary Camera - Color

    Opticstar - "Optimum One" Series - ED80S Gold + PX-75M 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 + PX-75M

    Regular Price: $1,448.00

    Special Price: $1,375.60

  3. Opticstar Optimum One ED80S Gold OTA with PX-75C Planetary Camera - Color

    Opticstar - "Optimum One" Series - ED80S Gold + PX-75C 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 + PX-75C

    Regular Price: $1,298.00

    Special Price: $1,233.10

  4. 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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    (48 States)
    Model#: 0271
    $1,450.00

  5. Vixen 140mm NA140SSf f/5.7 Neo Achromat Optical Tube Assembly Newer Model

    Vixen - 140mm NA140SSf (f/5.7) Neo Achromat Optical Tube Assembly - Newer Model

    Weighing in at 14.3 lbs this 5.5 inch Vixen telescope is an incredible performer. Deep Sky objects are easily visible and Astro-Imagers looking for a fast instrument with clear aperture will be impressed with the NA140’s performance.

    Now with the 2 Speed focuser,  flip mirror , 7x50 FinderScope and Tube Rings complete

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    (48 States)
    Model#: 58681

    Regular Price: $1,999.00

    Special Price: $1,499.00

  6. 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
    $1,275.00

  7. TeleVue - 60 Spotting Scope PACKAGE

    TeleVue - 60 Spotting Scope PACKAGE

    TELEVUE 60 PACKAGE INCLUDES:* TeleVue 60 Scope OTA* Custom fitted carry bag* 45 degree Image Erecting Prism* 8-24mm (15-45x) Zoom* 5mm Nagler Type 6 (72x)* Qwik-Point finder

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    (48 States)
    Model#: TSP-2460
    $1,474.00

  8. Celestron EdgeHD 800 Optical Tube Assembly

    Celestron - EdgeHD 800 8" Optical Tube Assembly (OTA)

    The EdgeHD optical system takes all of the compact power popularized by the SCT and combines it with an improved high definition optical system for wide field, astrograph quality images.

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    (48 States)
    Model#: 91030-XLT
    $1,299.00

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

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

    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#: 0810-60-00
    $1,299.00

  10. Vixen R200SS Optical Tube Assembly

    Vixen - 200mm R200Ss (f/4) Newtonian Reflector Optical Tube Assembly

    The telescope's large aperture and compact body make it ideally suited for astrophotography of nebulae, star clusters and comets. The use of the optional coma corrector allows for a sharp coma-free image from edge to edge, and the rack and pinion focuser, with an adapter, accepts 2 eyepieces.

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    (48 States)
    Model#: 5869
    10% sale while supplies last!

    Regular Price: $1,599.00

    Special Price: $1,439.10

  11. Orion - 180mm Maksutov-Cassegrain Telescope Optical Tube

    Orion - 180mm Maksutov-Cassegrain Telescope Optical Tube

    Looking for something to satisfy your appetite for power? Try a big Mak! For the most demanding enthusiast, our Orion 180mm Maksutov-Cassegrain Telescope sets a new standard for superb high-power performance in a remarkably compact design.

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    Model#: 09969
    $1,319.99

  12. Celestron EdgeHD 8 Optical Tube Assembly (CG5)

    Celestron - EdgeHD 8" Optical Tube Assembly (CG5)

    The EdgeHD optical system takes all of the compact power popularized by the SCT and combines it with an improved high definition optical system for wide field, astrograph quality images.

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    (48 States)
    Model#: 91031-XLT
    $1,299.00

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