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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. 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

  2. TeleVue - 85 Complete 85mm, f/7, APO (Doublet) Refractor - Ivory

    TeleVue - 85 Complete 85mm, f/7, APO (Doublet) Refractor - Ivory

    Televue TV-85 Complete APO Refractor - Ivory?  The Televue TV-85 is a superb travel scope, measuring only 21.5" (546mm) in length and weighing 8 lbs.?  23.6" (600mm) focal length combined with 3

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    (48 States)
    Model#: WXC-3370
    $2,495.00

  3. TeleVue - NP-127is 127mm, f/5.2 APO (Nagler-Petzval) Refractor - Imaging/Visual

    TeleVue - NP-127is 127mm, f/5.2 APO (Nagler-Petzval) Refractor - Imaging/Visual

    Both the optical and mechanical designs have been revised to reduce atmospheric defocusing sensitivity (visually the difference is virtually indiscernible)

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    Model#: NPI-5054

    Regular Price: $8,995.00

    Special Price: $6,895.00

  4. TeleVue - NP-101is 101mm, f/5.4 APO (Nagler-Petzval) Refractor - Imaging/Visual

    TeleVue - NP-101is 101mm, f/5.4 APO (Nagler-Petzval) Refractor - Imaging/Visual

    CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the challenge, and with the proper tweaks would be extraordinary tools for the imager.

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    (48 States)
    Model#: NPI-4057

    Regular Price: $5,800.00

    Special Price: $3,795.00

  5. Vixen A70Lf OTA

    Vixen - 70mm A70Lf (f/12.9) Achromatic Refractor Optical Tube Assembly*

    The A70Lf, although inexpensive, is not a toy telescope. Many amateurs begin with and enjoy countless hours under the stars with this instrument It has the same quality glass and exacting workmanship that goes into our much larger instruments

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    Model#: 2602
    30% sale while supplies last!

    Regular Price: $139.00

    Special Price: $97.99

  6. Vixen - 110mm VMC110L (f/9.4) Modified Cassegrain Optical Tube Assembly

    Vixen - 110mm VMC110L (f/9.4) Modified Cassegrain Optical Tube Assembly

    One of the best multi purpose Grab and Go Reflector Telescopes. This is a compact optical tube, with features found on our higher end telescopes.

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    Model#: 26052
    10% Off While Supplies Last!

    Regular Price: $299.00

    Special Price: $269.00

  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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    (48 States)
    Model#: 5865
    10% off while supplies last!

    Regular Price: $1,799.00

    Special Price: $1,619.00

  8. 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#: MEA-4507-00-05
    $1,999.00

  9. Takahashi - Epsilon 180ED Carbon Fiber  f/2.8 Hyperbolic Flat-Field Astrograph OTA - Limited Production

    Takahashi - Epsilon 180ED Carbon Fiber f/2.8 Hyperbolic Flat-Field Astrograph OTA - Limited Production

    This first addition to the new Epsilon Series introduces the newly designed ED corrector and fast speed of f/2.8. This fast field photo/visual astrograph is perfect for digital 35mm cameras and CCD cameras.

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    Model#: TEK0182
    $5,400.00

  10. 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#: CEL-91031-XLT
    Superior Optics - Superior Savings! Ends August 31st!

    Regular Price: $1,299.00

    Special Price: $1,199.00

  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#: ORI-09969
    $1,319.99

  12. Lunt Engineering 70mm ED Doublet OTA

    Lunt Engineering - 70mm ED Doublet OTA

    A new optical tube by Lunt, the 70mm ED Doublet!

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    Model#: LE70OTA
    $399.00

  13. Lunt Engineering 80mm ED Doublet OTA

    Lunt Engineering - 80mm ED Doublet OTA

    The Lunt 80mm ED Doublet OTA comes with fully multi-coated lenses that can be used for both night time and solar observing (with a solar filter!), depending on your choice.

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    Model#: LE80OTA
    $449.00

  14. 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

  15. Celestron - Omni XLT 120 OTA

    Celestron - Omni XLT 120 OTA

    Globular clusters, close binary star pairs, lunar and planetary images, will delight and amaze you! ... Learn More
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    (48 States)
    Model#: CEL-21090-1
    $499.00

  16. Celestron - Omni XLT 150mm Optical Tube Assembly  6" (OTA Only)

    Celestron - Omni XLT 150mm Optical Tube Assembly 6" (OTA Only)

    Omni XLT series features the stable platform of the CG-4 mount and high quality optics. ... Learn More
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    (48 States)
    Model#: CEL-31057-1

    Regular Price: $299.95

    Special Price: $219.95

  17. Astro-Tech Black 72mm f/6 ED Doublet Refractor OTA

    Astro-Tech - Black 72mm f/6 ED Doublet Refractor OTA

    Astro-Tech has built this optical tube by increasing their previous aperture of 66mm to a now 72mm. This allows 9% higher resolution and 19% better light gathering. In addition, a new and updated focuser has been supplied with this telescope.

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    (48 States)
    Model#: AT72BK
    $399.00

  18. Astro-Tech - Blue 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    Astro-Tech - Blue 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    Astronomy magazine called this scope’s predecessor, the 66mm Astro-Tech AT66ED, “a product everyone should own.”

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    (48 States)
    Model#: AT72BL
    $399.00

  19. Astro-Tech Green 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    Astro-Tech - Green 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    This green optical tube from Astro-Tech is a piece of equipment every advanced serious astronomer should consider. With high quality refractive optics, fabulous accessories, it is pretty amazing.

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    (48 States)
    Model#: AT72GR
    $399.00

  20. Astro-Tech - White 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    Astro-Tech - White 72mm f/6 ED Doublet Refractor Optical Tube Assembly

    Astronomy magazine called this scope’s predecessor, the 66mm Astro-Tech AT66ED, “a product everyone should own.”

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    (48 States)
    Model#: AT72WH
    $399.00

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