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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 Pro RC 400 f/8 Ritchey Chrétien Astrograph

    Officina Stellare - Pro RC 400 f/8 Ritchey Chrétien Astrograph

    The Officina Stellare Pro RC Series telescopes are made of some of the best quality optics including but not limited to, homogenous blanks of certified origin chosen between borosilicate to Pyrex tot Sitall and other low expansion ceramic glass.

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    Model#: PRC400
    $38,475.00

  2. Officina Stellare Veloce RH 300 F/3 Astrograph

    Officina Stellare - Veloce RH 300 f/3 Astrograph

    The New version of Officina Stellare Veloce RH 300 - Riccardi-Honders Astrograph is a premier, innovative, Officina Stellare exclusive!

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    Model#: VELRH300
    $27,540.00

  3. Officina Stellare Veloce Riccardi-Honders 250 f/5.6 Astrograph w/digital giant 95mm Finefocus and Rings Pair

    Officina Stellare - Veloce Riccardi-Honders 250 f/5.6 Astrograph w/digital giant 95mm Finefocus and Rings Pair

    Officina Stellare's Veloce RH 250 Riccard-Honders Astrograph features a large front full aperture corrector lens with near zero expansion glass in a Mangin mirror optical design, allowing a 250mm aperture, f/5.6 focal ratio, 1400mm focal length, double stage split internal light baffle, and a 3.6 micro spot size at the field's edge.

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    Model#: VELRH250
    $16,650.00

  4. Officina Stellare RiFAst 600 f/3.8 Optical Tube Assembly

    Officina Stellare - RiFAst 600 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#: RIFA600
    $71,887.50

  5. Officina Stellare RiFAst 500 f/3.8 Optical Tube Assembly Full Carbon

    Officina Stellare - RiFAst 500 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#: RIFA500FC
    $57,712.50

  6. Officina Stellare RiFAst 500 f/3.8 Optical Tube Assembly

    Officina Stellare - RiFAst 500 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#: RIFA500
    $46,500.00

  7. MallinCam VRC-8 203mm Hyperbolic Mirror true Ritchey-Chretien Optical Tube Assembly

    MallinCam - VRC-8 - 203mm Hyperbolic Mirror True Ritchey-Chretien Aluminum Optical Tube Assembly

    The tube of the MallinCam VRC-8 sports lightweight, sturdy aluminum construction and is finished in white. Both of the hyperbolic mirrors are engineered from zero-thermal-expansion quartz, and feature dielectric coatings, boasting an impressive 99 per cent reflectivity. ... Learn More
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    Model#: VRC-8
    $1,079.99

  8. MallinCam VRC-6 152mm Ritchey-Chretien Optical Tube Assembly

    MallinCam - VRC-6 - 152mm Ritchey-Chretien Optical Tube Assembly

    The tube of the MallinCam VRC-6 sports lightweight, sturdy aluminum construction and is finished in white. Both of the hyperbolic mirrors are engineered from zero-thermal-expansion quartz, and feature dielectric coatings, boasting an impressive 93 per cent reflectivity. Each mirror can be separately collimated for exquisite precision and the collimation can be locked. ... Learn More
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    Model#: VRC-6
    $499.99

  9. Sky-Watcher USA Esprit 150mm ED Triplet APO Refractor

    Sky-Watcher USA - Esprit 150mm 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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    Model#: S11430
    $6,399.00

  10. 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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    Model#: S11420
    $3,199.00

  11. 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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    Model#: S11410
    $2,499.00

  12. 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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    Model#: S11400
    $1,649.00

  13. 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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    Model#: ES-ED0806-01
    $100 off + WOW!! Explore Scientific 25% OFF Holiday Sale! ENDS DEC. 30th

    Regular Price: $729.99

    Special Price: $472.00

  14. 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

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

    Explore Scientific - ED102mm f/7 Classic White "Essential Series" Air-Spaced Triplet Refractor *

    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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    Model#: ES-ED10207-01
    $200.00 OFF +WOW!! Explore Scientific 25% OFF Holiday Sale! ENDS DEC. 30th

    Regular Price: $1,249.99

    Special Price: $787.00

  16. 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

  17. 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

  18. Explore Scientific 210mm f/3.8 White Aluminum Photo Newtonian Reflector

    Explore Scientific - 210mm f/3.8 White Aluminum Tube Newtonian Reflector

    The Explore Scientific 210mm White Aluminum Photo Newtonian Reflector has a very fast focal ratio and large aperture making it suitable well for ... Learn More
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    (48 States)
    Model#: PN21038-HRCC
    $899.99

  19. Bresser - Messier AR-80/900 Optical Tube with EQ Sky Mount and Tripod

    Bresser - Messier AR-80/900 Optical Tube with EQ Sky Mount and Tripod

    The Bresser Messsier AR-80/900 is an excellent scope for beginners due to its remarkable light gathering power for better detailed observation.

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    (48 States)
    Model#: BR-80900

    Regular Price: $313.99

    Special Price: $209.00

  20. MallinCam Micro-EX 960H EXview HAD II CCD Camera VRC-6 Combo

    MallinCam - Micro-EX 960H EXview HAD II CCD Camera - VRC-6 Combo

    MallinCam's new combo includes the lightweight, versatile and compact Micro-EX CCD video camera in conjunction with the 6" MallinCam VRC-6, a full Ritchey-Chretien optical tube scope, which has been optimized for video applications.

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    (48 States)
    Model#: Micro-EX-VRC-6
    $599.00

Items 61 to 80 of 178 total

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