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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. 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. 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-75M

    Regular Price: $1,448.00

    Special Price: $1,375.60

  2. 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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    Model#: 5869
    10% sale while supplies last!

    Regular Price: $1,599.00

    Special Price: $1,439.10

  3. Celestron C9.25-A XLT (CGE) OTA

    Celestron - C9.25-A XLT (CGE) Optical Tube Assembly

    Celestron's high quality Schmidt Cassegrain design, available in an Optical Tube Assembly.

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    (48 States)
    Model#: 91027-XLT
    $1,449.00

  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. 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

  6. 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

  7. 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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    Model#: 5865
    27% sale while supplies last!

    Regular Price: $2,199.00

    Special Price: $1,595.00

  8. Explore Scientific - ED127 Classic White "Essential Series" Air Spaced Triplet Apochromatic Telescope

    DISCONTINUED: Explore Scientific - ED127 Classic White "Essential Series" Air Spaced Triplet Apochromatic Telescope

    The Explore ED127 Essential Edition telescope comes with a white aluminum tube with black accents.

    No Longer Available please see the ES-ED127075-03

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    (48 States)
    Model#: ES-ED127075-02
  9. 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

  10. Borg - 77 ED II f/4.6 Astrograph Set (2178 + 7150 + 7137 + 7753 + 7835 + 7870)

    Borg - 77 ED II f/4.6 Astrograph Set (2178 + 7150 + 7137 + 7753 + 7835 + 7870)

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    (48 States)
    Model#: B07746
    $1,695.00

  11. Celestron C11-A XLT (CGE) Optical Tube Assembly

    Celestron - C11-A XLT (CGE) Optical Tube Assembly

    Celestron C-11A OTA with Starbright XLT.

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    Model#: 91036-XLT
    $1,695.00

  12. Vixen 140mm NA140SSf (f/5.7) Neo Achromat Optical Tube Assembly

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

    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#: 5868

    Regular Price: $1,799.00

    Special Price: $1,699.00

  13. Explore Scientific - 127mm Air-Spaced Triplet ED Refractor Telescope

    DISCONTINUED: Explore Scientific - 127mm Air-Spaced Triplet ED Refractor Telescope

    This is a discontinued item. We recommend the EDT-127075-00 telescope.

    Explore Scientific's 127mm f/7.5 telescope is an air-spaced triplet ED APO refractor telescope that utilizes Hoya ED glass.

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    Model#: TED127075-00
  14. 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

  15. Explore Scientific - ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed and manufactured by Hoya Optical of Japan.

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    (48 States)
    Model#: EDT-10207-CF

    Regular Price: $3,844.99

    Special Price: $1,729.99

  16. 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

  17. Meade - 10" LX200-ACF (f/10) Advanced Coma-Free OTA

    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#: 1010-60-00
    $1,799.00

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

    Celestron - C11-A XLT (CG-5) 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#: 91067-XLT
    $1,895.00

  19. Meade 115mm Series 6000 ED Triplet APO (f/7) OTA

    Meade - 115mm Series 6000 ED Triplet APO (f/7) OTA

    Meade 115mm ED Triplet APO Refractor #4507-00-05. For crisp wide field observing and imaging, nothing can beat a true triple-element Apochromatic Refractor (APO)

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    (48 States)
    Model#: 4507-00-05
    $1,999.00

  20. 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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    FREE SHIPPING
    (48 States)
    Model#: 58681
    $1,999.00

Items 81 to 100 of 177 total

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