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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. 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

  2. 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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    Model#: 1008-80-00
    $2,499.00

  3. 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

  4. 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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    Model#: 1408-80-00
    $5,999.00

  5. 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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    Model#: 1608-80-00
    $9,999.00

  6. 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
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    Model#: GXF-3371

    Regular Price: $2,350.00

    Special Price: $2,195.00

  7. ASA - 200mm Hyperbolic Astrograph

    ASA - 200mm Hyperbolic Astrograph

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    Model#: 8HSOK3ZK
    $11,235.00

  8. 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

  9. Explore Scientific - 127mm f/6.5 Achromatic Refractor Optical Tube Assembly

    Explore Scientific - 127mm f/6.5 Achromatic Refractor Optical Tube Assembly

    The 127mm f/6.5 Achromatic refractor from Explore Scientific is an air spaced doublet refractor telescope mainly for visual observing celestial objects.

    Purchase A DAR127 and get $129.95 In accesories At N/C 9.7mm, 20mm 70 degree and a Red flash light!!!

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    Model#: DAR127065-00
    $649.99

  10. Explore Scientific - AR102 f/6.5 Air-Spaced Doublet Achromatic Refractor Telescope

    Explore Scientific - AR102 f/6.5 Air-Spaced Doublet Achromatic Refractor Telescope

    The latest addition to the Air-Spaced Doublet AR Series is the very portable, grab-and-go 102mm! Like its two larger brothers, the AR127,

    and the AR152, these are classic air-spaced, crown-and-flint, doublet achromatic refractors with superior-class optical figure, in a short (f/6.5) focal length design.

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    Model#: DAR102065-00
    $499.00

  11. Explore Scientific - David H. Levy Comet Hunter f/4.8 Carbon Fiber Maksutov Newtonian Optical Tube Assembly

    Explore Scientific - David H. Levy Comet Hunter f/4.8 Carbon Fiber Maksutov Newtonian Optical Tube Assembly

    The Explore Scientific David H. Levy Comet Hunter is the result of a dream collaboration between long-time amateur astronomer & Explore Scientific founder, Scott Roberts, and one of his life-long heroes, David H. Levy. NOTE: Case, Finder Scope and Eyepiece NOT Included with this package

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    (48 States)
    Model#: MN06048CF-03
    $999.99

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

    Explore Scientific - ED127 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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    Model#: EDT-127075-CF
    $5,556.99

  13. 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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    Model#: EDT-10207-CF
    $3,844.99

  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
    $2,556.99

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

    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.

    LOOKING TO ADD A CASE AND A DIAGONAL FOR $100.00? GOTO: EDT127075-00

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    Model#: ES-ED127075-02
    $1,599.99

  16. 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

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

    Takahashi - Mewlon 300CRS Dall-Kirkham Optical Tube Assembly

    The Mewlon-300CRS is the largest in the corrected Dall-Kirkhams made by Takahashi.

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    (48 States)
    Model#: TLK3502
    $16,995.00

  18. 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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    (48 States)
    Model#: OSRED80S6

    Regular Price: $799.00

    Special Price: $759.05

  19. 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

  20. 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)

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

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