Happily Serving You in the Same Location for Over 58 Years!

Welcome!

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 162 total

per page
Page:
  1. 4

Set Ascending Direction
  1. Orion - 8 " f/8 Ritchey Cretien Optical Tube Assembly

    Orion - 8 " f/8 Ritchey Cretien Optical Tube Assembly

    * Ritchey-Chretien optical design produces superb flat-field, coma-free images that are superior to those achievable with conventional reflector or Schmidt-Cassegrain telescopes * One of the most compact Ritchey-Chretien astrographs available, at ... Learn More
    Model#: 8958
    $1,195.95

  2. Orion - 180mm Maksutov-Cassegrain Telescope Optical Tube

    Orion - 180mm Maksutov-Cassegrain Telescope Optical Tube

    Looking for something to satisfy your appetite for power? Try a big Mak! For the most demanding enthusiast, our Orion 180mm Maksutov-Cassegrain Telescope sets a new standard for superb high-power performance in a remarkably compact design.

    ...
    Learn More
    Model#: 09969
    $1,219.95

  3. Orion 10" f/8 Ritchey Cretien Optical Tube Assembly

    Orion - 10 " f/8 Ritchey Cretien Optical Tube Assembly

    Go after even the most elusive and faint deep-sky targets with the Orion 10" f/8.0 Ritchey-Chretien Astrograph. Featuring virtually coma-free optics for superb imaging performance, the Orion 10" f/8.0 Ritchey-Chretien Astrograph boasts a plethora of deluxe features

    ...
    Learn More
    Model#: 8961
    $2,694.95

  4. 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: OSRED80S6

    Regular Price: $799.00

    Special Price: $759.05

  5. Opticstar AR90S Gold DS 90mm f/5.5 Apochromat Refractor OTA

    Opticstar - AR90S Gold DS 90mm f/5.5 Apochromat Refractor Optical Tube Assembly

    The Opticstar AR90S Gold Dual Speed short-tube refractor is ideal as a portable scope and can be used for observing, imaging or as a guide scope. It uses a 90mm achromatic doublet that is fully broad-band multicoated to increase light transmission.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: OSRAR90S5GD

    Regular Price: $459.00

    Special Price: $436.05

  6. Opticstar AR80S Gold DS 80mm f/5 Apochromat Refractor Optical Tube Assembly

    Opticstar - AR80S Gold DS 80mm f/5 Apochromat Refractor Optical Tube Assembly

    The Opticstar AR80S Gold Dual Speed short-tube refractor is ideal as a portable scope and can be used for observing, imaging or as a guide scope. It uses a 80mm achromatic doublet that is fully broad-band multicoated to increase light transmission.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: OSRAR80SGD

    Regular Price: $399.00

    Special Price: $379.05

  7. Opticstar AR80S Gold DS 80mm f/5 Apochromat Refractor Guidescope

    Opticstar - AR80S Gold 80mm f/5 Achromatic Refractor Guidescope with Rings, Dovetail, and Crayford Focuser

    The AR80S Guidescope kit consists of the Opticstar AR80S telescope, set of collimating rings and Vixen type dovetail to mount the telescope to standard mount saddles as found on the Sky-Watchers, Celestron CG-5, Vixen and other mounts.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: OSRAR80SGS

    Regular Price: $399.00

    Special Price: $379.05

  8. Opticstar - "Optimum One" Series - ED80S Gold 80mm ED Fluorite Doublet Refractor with SL-131C Colour Planetary Camera

    Opticstar - "Optimum One" Series - ED80S Gold 80mm ED Fluorite Doublet Refractor with SL-131C 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: ED80S + SL-131C

    Regular Price: $998.00

    Special Price: $948.10

  9. 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: ED80S + PX-75M

    Regular Price: $1,448.00

    Special Price: $1,375.60

  10. 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: ED80S + PX-75C

    Regular Price: $1,298.00

    Special Price: $1,233.10

  11. Opticstar Optimum One ED80S Gold OTA with PX-35C Planetary Camera - Color

    Opticstar - "Optimum One" Series - ED80S Gold + PX-35C 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: ED80S + PX-35C

    Regular Price: $1,098.00

    Special Price: $1,043.10

  12. Opticstar - "Optimum One" Series - ED80S Gold + PL-131M Monochrome Planetary Camera

    Opticstar - "Optimum One" Series - ED80S Gold + PL-131M Monochrome 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: ED80S + PL-131M

    Regular Price: $1,148.00

    Special Price: $1,090.60

  13. RC24

    Optical Guidance Systems - Ritchey-Chretien 24 " f/8 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: RC24
    $83,900.00

  14. RC20

    Optical Guidance Systems - Ritchey-Chretien 20 " f/8.1 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: RC20
    $58,900.00

  15. RC16

    Optical Guidance Systems - Ritchey-Chretien 16 " f/8.4 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: RC16
    $37,900.00

  16. Optical Guidance Systems - Ritchey-Chretien 14.5 " f/7.9 - Optical Tube Assembly

    Optical Guidance Systems - Ritchey-Chretien 14.5 " f/7.9 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: RC14.5
    $24,900.00

  17. RC12.5

    Optical Guidance Systems - Ritchey-Chretien 12.5 " f/9 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: RC12.5
    $19,900.00

  18. RC10
  19. Optical Guidance Systems - Classic Cassegrain 24 " f/8 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 24 " f/8 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: CC24
    $83,900.00

  20. Optical Guidance Systems - Classic Cassegrain 20 " f/8.1 - Optical Tube Assembly

    Optical Guidance Systems - Classic Cassegrain 20 " f/8.1 - Optical Tube Assembly

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: CC20
    $58,900.00

Items 61 to 80 of 162 total

per page
Page:
  1. 4

Set Ascending Direction