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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. Officina Stellare - RiFAst 400 f/3.8 Optical Tube Assembly - Full Carbon

    Officina Stellare - RiFAst 400 f/3.8 Optical Tube Assembly - Full Carbon

    The Officina Stellare RiFAst astrograph series was designed to be a further step up from the RiLA series as far as focal ratio and field of view to accommodate a wider range of imagers, rotators, focusers and guiders!

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    Model#: RIFA400FC
    $30,900.00

  2. Officina Stellare RiFAst 400 f/3.8 Optical Tube Assembly

    Officina Stellare - RiFAst 400 f/3.8 Optical Tube Assembly

    The Officina Stellare RiFAst astrograph series was designed to be a further step up from the RiLA series as far as focal ratio and field of view to accommodate a wider range of imagers, rotators, focusers and guiders!

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    Model#: RIFA400
    $25,650.00

  3. Officina Stellare RiFAst 300 f/3.8 Optical Tube Assembly - Full Carbon

    Officina Stellare - RiFAst 300 f/3.8 Optical Tube Assembly - Full Carbon

    The Officina Stellare RiFAst astrograph series was designed to be a further step up from the RiLA series as far as focal ratio and field of view to accommodate a wider range of imagers, rotators, focusers and guiders!

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    Model#: RIFA300FC
    $23,400.00

  4. Officina Stellare RiFAst 300 f/3.8 Optical Tube Assembly

    Officina Stellare - RiFAst 300 f/3.8 Optical Tube Assembly

    The Officina Stellare RiFAst astrograph series was designed to be a further step up from the RiLA series as far as focal ratio and field of view to accommodate a wider range of imagers, rotators, focusers and guiders!

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    Model#: RIFA300
    $18,900.00

  5. Celestron NexStar 6SE Optical Tube Assembly

    Celestron - NexStar 6SE Optical Tube Assembly

    Portability and serious performance come together in the NexStar 6 SE. The ultra portable 6 SE features a precision optical system with 1500mm focal length (f/10) and offers 44% more light gathering than a 5" telescope.

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    (48 States)
    Model#: 11068-OTA
    $389.95

  6. Vixen ED100Sf 100mm (3.9 inch) ED Apochromatic Refractor Optical Tube Assembly

    Vixen - ED100Sf 100mm (3.9 inch) ED Apochromatic Refractor Optical Tube Assembly

    The Vixen ED100Sf 100mm ED Apochromatic Refractor includes Extra-Low Dispersion glass that reduces aberration to create sharp images.

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    (48 States)
    Model#: 2618
    $699.00

  7. Celestron - 6" Newtonian Reflector Optical Tube Assembly

    Celestron - 6" Newtonian Reflector Optical Tube Assembly

    The Celestron Advanced VX 6" Newtonian Telescope is excellent for basic deep sky observing as well as planetary observing due to its impressive light gathering power of the mirrors and mid fast focal ratio.

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    Model#: 32054-OTA

    Regular Price: $269.00

    Special Price: $179.00

  8. Explore Scientific ED80mm f/6 Classic White "Essential Series" Air-Spaced Triplet Refractor

    Explore Scientific - ED80mm f/6 Classic White "Essential Series" Air-Spaced Triplet Refractor

    This 80mm f/6 ED Apochromatic triplet is an air-spaced triplet refractor telescope for observing and photography of celestial objects. Instrument utilizing Hoya ED glass, comes equipped with a 99% dielectric-coated 2-inch diagonal. Case, Finder Scope and Mount NOT included.

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    (48 States)
    Model#: ES-ED0806-01
    $729.99

  9. AG Optical 14" Imaging Harmer Wynne Astrograph

    AG Optical - 14" Imaging Harmer Wynne Astrograph

    Imaging Harmer Wynne (iHW) astrographs are high resolution, fast focal ratio instruments with excellent on and off axis performance.

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    (48 States)
    Model#: iHW14
    $23,975.00

  10. Explore Scientific 102mm f/7 ED Apochromatic Triplet Essential Refractor Telescope

    Explore Scientific - 102mm f/7 ED Apochromatic Triplet Essential Refractor Telescope

    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.

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

  11. 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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    Model#: ED80S + PX-75M

    Regular Price: $1,448.00

    Special Price: $1,375.60

  12. 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. 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-75C

    Regular Price: $1,298.00

    Special Price: $1,233.10

  13. Lunt Engineering - 152mm f/7.9 ED APO Refractor

    Lunt Engineering - 152mm f/7.9 ED APO Refractor

    A 6" f/7.9 ED with the glass combination Chengdu CDGM FK61 and Lanthanum H-LAF53.

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    (48 States)
    Model#: APM-152-1200-FK61/LA-D-2.5ZTA
    $3,990.00

  14. APM 100mm 45° ED-APO Binoculars with Interchangeable Eyepieces

    Lunt Engineering - 100mm 45° ED-APO Binoculars with Interchangeable Eyepieces

    This binocular is made for very high power use up to above 100 power.

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    (48 States)
    Model#: APM100ED-BINO
    $2,950.00

  15. 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
    $1,999.00

  16. 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

  17. Sky-Watcher USA Esprit 100mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 100mm 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#: S11410
    $2,499.00

  18. Sky-Watcher USA Esprit 120mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 120mm 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#: S11420
    $3,199.00

  19. Orion ShortTube 80-T Refractor Telescope

    Orion - ShortTube 80-T Refractor Telescope

    The Orion ShortTube 80-T Optical Tube assembly is an f/5 multi-coated 400mm refractor that provides excellent wide field of views with excellent contrast for viewing planets.

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    Model#: 09946

    Regular Price: $179.99

    Special Price: $149.99

  20. Bresser Messier AR-127S/635 Optical Tube Assembly

    Bresser - Messier AR-127S/635 Optical Tube Assembly

    The Bresser Messier AR-127S/635 127mm refractor is excellent for touring the solar system! Planets like Jupiter and Saturn will show cloud bands, moons, and even Saturn's rings with just the use of this telescope. Closer to Earth, the moon's craters and surface geological features will all become visible.

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    FREE SHIPPING
    (48 States)
    Model#: BR-27635

    Regular Price: $869.99

    Special Price: $519.00

Items 61 to 80 of 174 total

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