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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 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

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    Model#: VELRH250
    $16,650.00

  2. Meade 10" LX80 Schmidt-Cassegrain Optical Tube Assembly (OTA) w/UHTC

    Meade - 10" LX80 Schmidt-Cassegrain Optical Tube Assembly (OTA) w/UHTC

    The Meade 10" SC Schmidt-Cassegrain includes (254mm) f/10 optical tube with industry leading Ultra-High Transmission Coatings (UHTC) achieving 15% better light transmission than standard coatings

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    (48 States)
    Model#: 1010-08-00
    $1,199.00

  3. Explore Scientific ED 152 Carbon Fiber Edition f/8 Air Spaced Triplet Refractor with Rack and Pinion Focuser

    Explore Scientific - ED 152mm Carbon Fiber Edition f/8 Air Spaced Triplet Refractor with Rack and Pinion Focuser * Discontinued SKU

    The 6" (152mm) aperture Explore Scientific ES152CF with JOC focuser uses a premium Hoya ED glass element and state-of-the-art optical multicoatings in its ... Learn More
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    (48 States)
    Model#: TED15208CF-C3
    $4,999.99

  4. TeleVue 127mm f/5.3 APO (Nagler-Petzval) Astrograph Refractor

    TeleVue - 127mm f/5.3 APO (Nagler-Petzval) Astrograph Refractor

    Tele Vue Optics and Finger Lakes Instrumentation have teamed together to create a "turn-key," wide-field imaging system dedicated to the astro-imager. ... Learn More
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    (48 States)
    Model#: NPF-5055
    $8,995.00

  5. Celestron NexStar 6SE Optical Tube Assembly

    Celestron - NexStar 6SE 150mm 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. 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.

    Explore Scientific Instruction Booklet for Triplet Refractors

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

  7. 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.

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    (48 States)
    Model#: ED80S + PX-75M

    Regular Price: $1,448.00

    Special Price: $1,375.60

  8. 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.

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    (48 States)
    Model#: ED80S + PX-75C

    Regular Price: $1,298.00

    Special Price: $1,233.10

  9. Borg - 71FL Fluorite Optical Tube - Fork Mount Set

    Borg - 71FL Fluorite Optical Tube - Fork Mount Set

    Fork mount set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 0271
    $1,450.00

  10. Tripod is NOT included!!!!

    Borg - 71FL Fluorite Optical Tube - Astro Visual Set

    Astro Visual set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6272
    $1,175.00

  11. Camera is NOT Included!!!!!

    Borg - 71FL Fluorite Optical Tube - Telephoto Set

    Telephoto set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6271
    $1,195.00

  12. Camera is NOT Included!!!

    Borg - 71FL Fluorite Optical Tube - Basic Set

    Basic set for the Borg 71FL Fluorite Optical Tube.

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    (48 States)
    Model#: 6071
    $1,150.00

  13. Borg - 60mm ED f/5.8 (350mm FL) Optical Tube

    Borg - 60mm ED f/5.8 (350mm FL) Optical Tube

    Mini Borg scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block (left), or in an available finder bracket.

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    (48 States)
    Model#: 6260
    $575.00

  14. Borg - 60mm ED f/5.4 (325mm FL) Achromat

    Borg - 60mm ED f/5.4 (325mm FL) Achromat

    Mini Borg scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block (left), or in an available finder bracket.

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    (48 States)
    Model#: 6161
    $299.00

  15. Borg 50mm F5 Achromat

    Borg - 50mm F5 Achromat

    Mini Borg scopes may be mounted directly with a 1/4"-20 threaded screw into the standard mounting block (left), or in an available finder bracket.

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    (48 States)
    Model#: 6150
    $215.00

  16. Borg - Mini Borg 45EDII F7.2

    Borg - Mini Borg 45EDII F7.2

    Mini Borg scopes are compatible with a wide variety of standard Borg back-end accessories:

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    (48 States)
    Model#: 6045
    $375.00

  17. Borg Series 45 Optical Tube Black

    Borg - Series 45 Optical Tube - Black

    The Borg Series 45 telescopes are based around a 45mm diameter tube and the 42mm/P1 thread used on the popular M42 photographic system.

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    (48 States)
    Model#: 6037
    $335.00

  18. Borg Series 45 Optical Tube - White

    Borg - Series 45 Optical Tube - White

    The Borg Series 45 telescopes are based around a 45mm diameter tube and the 42mm/P1 thread used on the popular M42 photographic system.

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    (48 States)
    Model#: 6036
    $315.00

  19. Takahashi Epsilon 130D Astrograph

    Takahashi - Epsilon 130D Astrograph

    Takahashi introduced their Epsilon Series flat-field hyperbolic astrographs in the middle 1980’s. The Epsilon-130 was the smallest aperture and most portable of the series. Now Takahashi is re-introducing the new ε-130D digital version of this astrograph.

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    (48 States)
    Model#: TEK1300
    $2,995.00

  20. Borg - 71FL Fluorite Optical Tube - Fork Mount Set with Tripod

    Borg - 71FL Fluorite Optical Tube - Fork Mount Set with Tripod

    Fork mount set for the Borg 71FL Fluorite Optical Tube with Tripod.

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    FREE SHIPPING
    (48 States)
    Model#: 0271S
    $1,730.00

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