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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. Takahashi - Epsilon 180ED f/2.8 Hyperbolic Flat-Field Astrograph OTA

    Takahashi - Epsilon 180ED f/2.8 Hyperbolic Flat-Field Astrograph OTA

    The Takahashi Epsilon-180ED (D=180mm, F/2.8), based on catadioptric telescope design (means association of lenses and mirrors) offers a fundamental innovation compared with Newton reflector or Schmidt astrograph.

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    (48 States)
    Model#: TEK0180
    $5,400.00

  2. Takahashi FS-60C OTA

    Takahashi - FS-60C 60mm (f/5.9) Fluorite Refractor Optical Tube Assembly

    Are you looking for an extreme high quality refractor telescope to serve across a variety of purposes? Then look no more... Takahashi has your answer with the FS-60CB Fluorite Refractor

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    (48 States)
    Model#: TFK6004
    $1,190.00

  3. Takahashi Mewlon 210 Dall-Kirkham OTA

    Takahashi - Mewlon 210 Dall-Kirkham Optical Tube Assembly

    Dall-Kirkham Telescope combines refractor-like performance in a larger folded optic reflector design. The Takahashi Mewlon 210 at prime focus provides a focal length of 2415mm, focal ratio of f/11.5 and image circle of 18mm

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    (48 States)
    Model#: TLK2101
    $4,238.00

  4. Takahashi Mewlon 250 Dall-Kirkham OTA

    Takahashi - Mewlon 250 Dall-Kirkham Optical Tube Assembly

    The Mewlon combines refractor-like performance in a larger folded optic reflector design. The 250 optical tube assembly has 9.8" of aperture and a focal ratio of 12.

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    (48 States)
    Model#: TLK2500
    $7,500.00

  5. Mewlon 250 OTA

    Takahashi - Mewlon 250 Dall-Kirkham OTA - (BRC-250 Double Ring Tube Holder)

    The Mewlon combines refractor-like performance in a larger folded optic reflector design.The 250 optical tube assembly has 9.8" of aperture and a focal ratio of 12.

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    Model#: TLK2501
    $7,895.00

  6. Takahashi Mewlon 300 Dall-Kirkham Optical Tube Assembly

    Takahashi - Mewlon 300 Dall-Kirkham Optical Tube Assembly

    The Mewlon combines refractor-like performance in a larger folded optic reflector design.The 300 optical tube assembly has 11.8" of aperture and a focal ratio of 11.9

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    Model#: TLK3001
    $15,995.00

  7. Takahashi - Sky 90II 3.5" f/5.6 Fluorite APO Refractor Optical Tube Assembly

    Takahashi - Sky 90II 3.5" f/5.6 Fluorite APO Refractor Optical Tube Assembly

    The Takahashi Sky 90 is a refractor telescope that executes optical excellence.

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    Model#: TSK9001
    $2,390.95

  8. Takahashi TOA-150 OTA

    Takahashi - TOA-150 Optical Tube Assembly

    The TOA-150 is the second Takahashi Ortho Apochromat to be developed by Takahashi. It features a newly designed triplet objective. This new design like its smaller companion the TOA-130 is absolutely color free ... Learn More
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    (48 States)
    Model#: TOK1501
    $11,400.00

  9. Takahashi TOA-150B Refractor Optical Tube Assembly

    Takahashi - TOA-150B Refractor Optical Tube Assembly

    The Takahashi TOA-150B optical tube assembly is based upon an apochromatic refractor design which is beneficial to inhibit uncessary color often exposed when viewing bright stars and/or planets.

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    Model#: TOA-150B
    $11,885.00

  10. Takahashi - TSA-102S 102mm Triplet Super APO Refractor Optical Tube Assembly

    Takahashi - TSA-102S 102mm Triplet Super APO Refractor Optical Tube Assembly

    The TSA-10S2 is the first in the new TSA line of Takahashi triplet apochromats. The color free images produced will delight the lunar, planetary and deep sky observer with very high contract images with pin point stars.

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    (48 States)
    Model#: TSA0102
    $3,350.00

  11. TeleVue - 102i Complete - Ivory

    TeleVue - 102i Complete - Ivory

    The Tele Vue-102i complete package includes the following: * Hard Carrying Case * 1x Prism Compensator * Bino Vue Body * 2" to 1.25" Flat Top Adapter * 1

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    (48 States)
    Model#: WBC-4086
    $3,650.00

  12. TeleVue - 102i O.T.A. - Ivory

    TeleVue - 102i O.T.A. - Ivory

    The Tele Vue-102i OTA includes the following: * Hard Carrying Case * 1x Prism Compensator * 2" to 1

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    (48 States)
    Model#: WBO-4086
    $2,480.00

  13. TeleVue - 60 Spotting Scope PACKAGE

    TeleVue - 60 Spotting Scope PACKAGE

    TELEVUE 60 PACKAGE INCLUDES:* TeleVue 60 Scope OTA* Custom fitted carry bag* 45 degree Image Erecting Prism* 8-24mm (15-45x) Zoom* 5mm Nagler Type 6 (72x)* Qwik-Point finder

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    (48 States)
    Model#: TSP-2460
    $1,474.00

  14. TeleVue - 76 Complete 76mm, f/6.3, APO (Doublet) Refractor- Ivory

    TeleVue - 76 Complete 76mm, f/6.3, APO (Doublet) Refractor- Ivory

    Complete Includes: Custom soft case, Screw-on lens cover, Sliding dew shield, Plossl eyepiece, 2" focuser, 2" diagonal, 1 1/4" adapter, Ivory Powdercoat finish or Evergreen Powercoat

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    (48 States)
    Model#: WXC-3063
    $1,725.00

  15. TeleVue - 85 Complete - Brass

    TeleVue - 85 Complete - Brass

    Televue TV-85 (Complete) APO Refractor - Brass?  The Televue TV-85 is a superb travel scope, measuring only 21.5" (546mm) in length and weighing 9.6 lbs.?  23.6" (600mm) focal length combined with 3

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    (48 States)
    Model#: BXC-3370

    Regular Price: $3,295.00

    Special Price: $2,395.00

  16. TeleVue - 85 Complete 85mm, f/7, APO (Doublet) Refractor - Ivory

    TeleVue - 85 Complete 85mm, f/7, APO (Doublet) Refractor - Ivory

    Televue TV-85 Complete APO Refractor - Ivory?  The Televue TV-85 is a superb travel scope, measuring only 21.5" (546mm) in length and weighing 8 lbs.?  23.6" (600mm) focal length combined with 3

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    (48 States)
    Model#: WXC-3370
    This Amazing Price will Expire once our Supplies Do

    Regular Price: $2,495.00

    Special Price: $1,995.00

  17. TeleVue - NP-101is 101mm, f/5.4 APO (Nagler-Petzval) Refractor - Imaging/Visual

    TeleVue - NP-101is 101mm, f/5.4 APO (Nagler-Petzval) Refractor - Imaging/Visual

    CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the challenge, and with the proper tweaks would be extraordinary tools for the imager.

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    (48 States)
    Model#: NPI-4057

    Regular Price: $5,800.00

    Special Price: $3,795.00

  18. TeleVue - NP-127is 127mm, f/5.2 APO (Nagler-Petzval) Refractor - Imaging/Visual

    TeleVue - NP-127is 127mm, f/5.2 APO (Nagler-Petzval) Refractor - Imaging/Visual

    Both the optical and mechanical designs have been revised to reduce atmospheric defocusing sensitivity (visually the difference is virtually indiscernible)

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    (48 States)
    Model#: NPI-5054

    Regular Price: $8,995.00

    Special Price: $6,995.00

  19. TeleVue - NP-127is Imaging System

    TeleVue - NP-127is Imaging System

    CCD cameras have challenged telescope optics beyond anything ever placed at the focal plane. I knew our APO objectives were up to the challenge, and with the proper tweaks would be extraordinary tools for the imager

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    (48 States)
    Model#: NPI-5053
    $6,985.00

  20. TeleVue - TV-60 OTA   60mm, f/6, APO (Doublet) Refractor.

    TeleVue - TV-60 OTA 60mm, f/6, APO (Doublet) Refractor.

    Tele Vue-60 OTA 60mm, f/6, APO (Doublet) Refractor.

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    (48 States)
    Model#: TVO-2460

    Regular Price: $1,195.00

    Special Price: $795.00

Items 81 to 100 of 118 total

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