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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 ED80S Gold 80mm ED Fluorite Doublet Refractor OTA

    Opticstar - ED80S Gold 80mm ED Fluorite Doublet Refractor Optical Tube Assembly

    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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    FREE SHIPPING
    (48 States)
    Model#: OSRED80S6

    Regular Price: $799.00

    Special Price: $759.05

  2. Takahashi - Mewlon 300CRS Dall-Kirkham Optical Tube Assembly

    Takahashi - Mewlon 300CRS Dall-Kirkham Optical Tube Assembly

    Dall-Kirkham Telescopes by world-renowned TakahashiJapan© combines refractor-like performance in a larger folded optic reflector design. ... Learn More
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    (48 States)
    Model#: TLK3502
    $16,995.00

  3. Meade - 10" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Meade - 10" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Building on Meade’s award-winning Advanced Coma-Free (ACF) optics, the 12" OTA employs a fast f/8 optical system with high-contrast baffling that insures crisp, pinpoint imaging to the very edge of the field

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    FREE SHIPPING
    (48 States)
    Model#: 1008-80-00
    $2,499.00

  4. Orion - 8" f/8 Ritchey-Chretien Astrograph Telescope

    Orion - 8" f/8 Ritchey-Chretien Astrograph Telescope

    Orion is proud to introduce this highly regarded telescope design used by advanced astrophotographers worldwide . ... Learn More
    Model#: 08958
    $1,195.00

  5. 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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    FREE SHIPPING
    (48 States)
    Model#: B07746
    $1,695.00

  6. Borg - 45 ED II f/5 Astrograph Set (6045 + 7857 + 7885)

    Borg - 45 ED II f/5 Astrograph Set (6045 + 7857 + 7885)

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    FREE SHIPPING
    (48 States)
    Model#: B04561
    $850.00

  7. 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
    $379.00

  8. 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
    $379.00

  9. 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
    $379.00

  10. 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
    $379.00

  11. Meade - 12" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Meade - 12" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    The Meade Instruments 12" f/8 ACF Optical Tube Assembly (OTA) features a 12” aperture, f/8 optical system with Meade’s Advanced Coma Free (ACF) optics and high-contrast baffling that ensures crisp, pinpoint imaging to the very edge of the field.

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    (48 States)
    Model#: 1208-80-00
    $3,499.00

  12. Meade - 14" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Meade - 14" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    The Meade Instruments 14" f/8 ACF Optical Tube Assembly (OTA) features a 14” aperture, f/8 optical system with Meade’s Advanced Coma Free (ACF) optics and high-contrast baffling that ensures crisp, pinpoint imaging to the very edge of the field.

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    (48 States)
    Model#: 1408-80-00
    $5,999.00

  13. Takahashi Mewlon 250CRS Dall-Kirkham OTA

    Takahashi - Mewlon 250CRS Dall-Kirkham Optical Tube Assembly

    When Takahashi developed the Mewlon Correctors it meant any Mewlon-250 or 300 ever made could be converted into a flat field corrected telescope.

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    (48 States)
    Model#: TLK2502
    $9,250.00

  14. Explore Scientific ED80 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED80 Air Spaced Carbon Fiber Triplet Refractor Telescope

    This 80mm f/6 ED Apochromatic triplet is an air-spaced triplet refractor telescope for observing and photography of celestial objects.

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    (48 States)
    Model#: EDT-0806-CF
    Offer ends October 31, 2014!

    Regular Price: $1,149.99

    Special Price: $999.99

  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
    Offer ends October 31, 2014!

    Regular Price: $1,729.99

    Special Price: $1,479.99

  16. Explore Scientific - ED127 APO Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED127 APO Air Spaced Carbon Fiber Triplet Refractor Telescope

    The Explore Scientific 127mm f/7.5 Air-Spaced Triplet ED APO produces a visual experience that is often compared to much larger aperture reflector telescopes.

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    FREE SHIPPING
    (48 States)
    Model#: EDT-127075-CF
    Offer ends October 31, 2014!

    Regular Price: $2,499.99

    Special Price: $2,149.99

  17. Officina Stellare - RiDK 305 Riccardi Dall-Kirkham Optical Tube Assembly

    Officina Stellare - RiDK 305 Riccardi Dall-Kirkham Optical Tube Assembly

    Almost everyone knows about the high level of innovation and technology that comes with any OS products, it's clear at first sight.

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    Model#: RIDK 300
    $24,873.00

  18. ASA - 200mm Hyperbolic Astrograph

    ASA - 200mm Hyperbolic Astrograph

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    Model#: 8HSOK3ZK
    $11,235.00

  19. TeleVue - TV-85 Evergreen  85mm, f/7, APO (Doublet) Refractor

    TeleVue - TV-85 Evergreen 85mm, f/7, APO (Doublet) Refractor

    With APO performance and airline portability, the Tele Vue-85 has been delighting astronomy and birding enthusiasts and reviewers alike. ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: GXF-3371

    Regular Price: $2,350.00

    Special Price: $2,195.00

  20. Meade - 16" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Meade - 16" ACF Advanced Coma-Free (f/8) Optical Tube Assembly - (UHTC)

    Building on Meade’s award-winning Advanced Coma-Free (ACF) optics

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    FREE SHIPPING
    (48 States)
    Model#: 1608-80-00
    $9,999.00

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