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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.

Items 61 to 80 of 211 total

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  1. Officina Stellare RiLA 400 f/5.2 Ceramic Glass Full-Carbon Optical Tube
  2. Officina Stellare RiLA 400 f/5.2 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RiLA 400 f/5.2 Standard Glass Aluminum-Carbon Optical Tube

    The Officina Stellare Rila Series are known for having a fast focal ratio with a wide corrected field of view while maintaining a lightweight body. The apertures range from 300mm all the way to 800mm. The Rila 400 has a f/5.2 focal ratio.

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    Model#: RILA400SGA
    $20,778.26

  3. Officina Stellare RIFAst 600 f/3.8 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RIFAst 800 f/3.8 Ceramic Glass Full-Carbon Optical Tube

    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#: RIFA800CGC
    $186,169.26

  4. Officina Stellare RIFAst 600 f/3.8 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RIFAst 800 f/3.8 Standard Glass Aluminum-Carbon Optical Tube

    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#: RIFA800SGA
    $146,193.68

  5. Officina Stellare RIFAst 600 f/3.8 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RIFAst 700 f/3.8 Ceramic Glass Full-Carbon Optical Tube

    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#: RIFA700CGC
    $125,141.54

  6. Officina Stellare RiLA 800 f/5 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RiLA 800 f/5 Standard Glass Aluminum-Carbon Optical Tube

    The Officina Stellare Rila Series are known for having a fast focal ratio with a wide corrected field of view while maintaining a lightweight body. The apertures range from 300mm all the way to 800mm. The Rila 800 has a f/5 focal ratio.

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    Model#: RILA800SGA
    $127,436.28

  7. Officina Stellare RiLA 800 f/5 Ceramic Glass Full-Carbon Optical Tube
  8. Bresser 8" f/3.9 Newtonian Reflector Optical Tube Assembly

    Bresser - 8" f/3.9 Newtonian Reflector Optical Tube Assembly

    Designed for enhanced astrophotography and imaging performance, the Bresser 8" f/3.9 Reflector Telescope has a shortened focal length versus conventional scopes with a similar aperture to produce a fast f/3.9 focal ratio - translating to shorter exposure times.

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    Model#: BR-N20839
    $499.99

  9. 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 - Open Box

    Explore Scientific Instruction Booklet for Triplet Refractors

    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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    Model#: ED0806-01-OPEN
    $589.00

  10. Celestron EdgeHD 925 9.25" Optical Tube Assembly (OTA) - DEMO

    Celestron - EdgeHD 925 9.25" Optical Tube Assembly (OTA) - DEMO - Fully Warrentied

    The Celestron EdgeHD 925 catadioptric optical tube includes state of the art EdgeHD optical coatings to reduce the effect of coma, which is a major advantage for visual astronomy when adding the StarBright XLT coatings which increase light transmission.

    NOTE: This is a demo version.

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    Model#: 91040-XLT-DM
    $1,999.95

  11. Celestron EdgeHD 1100 11"  Optical Tube Assembly - DEMO

    Celestron - EdgeHD 1100 11" Optical Tube Assembly - DEMO - Full Factory Warranty

    EdgeHD optical system consists of a zero power corrector plate, a spherical primary mirror, and a secondary mirror along with a set of field flattening lenses integrated into the baffle.....

    NOTE: This is a demo version.

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    Model#: 91050-XLT-DM
    $2,650.00

  12. Celestron EdgeHD 1400  14" Optical Tube Assembly

    Celestron - EdgeHD 1400 14" Optical Tube Assembly - USED

    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.

    NOTE: This is a used version.

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    Model#: u91060-xlt
    $4,995.00

  13. DayStar Filters SolaREDi 66mm Dedicated Solar Telescope Prominence

    DayStar Filters - SolaREDi 66mm Dedicated Solar Telescope Prominence

    The DayStar Instrument SolaREDi 66 Solar Telescope is a state of the art designed solar instrument specifically targeted for observing Hydrogen Alpha wavelength with the 2.3X telecentric barlow lens.

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    Model#: DSR66P
    $1,995.00

  14. DayStar Filters SolaREDi 66mm Dedicated Solar Telescope Chromosphere

    DayStar Filters - SolaREDi 66mm Dedicated Solar Telescope Chromosphere

    The DayStar Instrument SolaREDi 66 Solar Telescope is a state of the art designed solar instrument specifically targeted for observing Hydrogen Alpha wavelength with the 2.3X telecentric barlow lens.

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    Model#: DSR66C
    $1,995.00

  15. Orion EON 115mm ED Triplet Apochromatic Refractor Telescope

    Orion - EON 115mm ED Triplet Apochromatic Refractor Telescope

    The Orion EON 115mm ED Triplet Refractor as a well affordable priced wide field instrument, excellent for astrophotographers who strive for a true-color instrument.

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    Model#: 10087
    $1,799.99

  16. Officina Stellare RiDK 600 f/7 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RiDK 600 f/7 Standard Glass Aluminum-Carbon Optical Tube

    The Riccard Dall-Kirkham 600 Astrograph is a state of the art optical tube designed by Massimo Riccardi, the Chief Optical Designer at Officina Stellare who has created a 24" astrograph resulting in fantastic astro-imaging performance and quality.

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    Model#: RIDK600SGA
    $54,085.33

  17. Officina Stellare RiDK 500 f/7 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RiDK 500 f/7 Standard Glass Aluminum-Carbon Optical Tube

    The Riccard Dall-Kirkham 500 Astrograph is a state of the art optical tube designed by Massimo Riccardi, the Chief Optical Designer at Officina Stellare who has created a 500mm astrograph resulting in fantastic astro-imaging performance and quality.

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    Model#: RIDK500SGA
    $34,560.00

  18. Officina Stellare RiDK 400 f/7 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RiDK 400 f/7 Standard Glass Aluminum-Carbon Optical Tube

    The Riccard Dall-Kirkham 400 Astrograph is a state of the art optical tube designed by Massimo Riccardi, the Chief Optical Designer at Officina Stellare who has created a 400mm astrograph resulting in fantastic astro-imaging performance and quality.

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    Model#: RIDK400SGA
    $21,985.71

  19. Officina Stellare RIFAst 600 f/3.8 Standard Glass Aluminum-Carbon Optical Tube

    Officina Stellare - RIFAst 700 f/3.8 Standard Glass Aluminum-Carbon Optical Tube

    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!

    ...
    Learn More
    Model#: RIFA700SGA
    $82,312.82

  20. Officina Stellare RIFAst 600 f/3.8 Ceramic Glass Full-Carbon Optical Tube

    Officina Stellare - RIFAst 600 f/3.8 Ceramic Glass Full-Carbon Optical Tube

    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#: RIFA600CGC
    $79,693.20

Items 61 to 80 of 211 total

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