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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. MallinCam VRC-10 254mm True Ritchey-Chrétien  Dual Hyperbolic Optical Tube Assembly

    MallinCam - VRC-10 - 254mm True Ritchey-Chrétien Dual Hyperbolic Carbon Fiber Optical Tube Assembly

    MallinCam partnered with Guan Sheng Optical (GSO) in Taiwan to bring you this exceptional piece of astronomical equipment. The optical tubes have been calibrated in order to function in perfect harmony with MallinCam cameras. 

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    (48 States)
    Model#: VRC-10
    $2,899.99

  2. 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. The combination of these two MallinCam instruments gives enough light-gathering ability to resolve even the most obscure of objects. ... Learn More
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    (48 States)
    Model#: Micro-EX-VRC-6
    $599.00

  3. Lunt Engineering 80mm ED Doublet OTA

    Lunt Engineering - 80mm ED Doublet OTA

    The Lunt 80mm ED Doublet OTA comes with fully multi-coated lenses that can be used for both night time and solar observing (with a solar filter!), depending on your choice.

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    (48 States)
    Model#: LE80OTA
    $449.00

  4. Lunt Engineering 70mm ED Doublet OTA

    Lunt Engineering - 70mm ED Doublet OTA

    A new optical tube by Lunt, the 70mm ED Doublet!

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    Model#: LE70OTA
    $399.00

  5. Lunt Engineering - 152mm f/7.9 ED APO Refractor

    Lunt Engineering - 152mm f/7.9 ED APO Refractor

    A 6" f/7.9 ED with the glass combination Chengdu CDGM FK61 and Lanthanum H-LAF53.

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    Model#: APM-152-1200-FK61/LA-D-2.5ZTA
    $3,990.00

  6. DIAGONAL NOT INCLUDED

    Lunt Engineering - 102mm ED Doublet OTA

    A new optical tube by Lunt, the 102mm ED Doublet! With a slow focal ratio of f/7, this optical tube is an excellent choice for observation of the moon, sun, and planets. When using solar filter, this telescope is great for sun observing!

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    (48 States)
    Model#: LE102OTA
    $729.00

  7. APM 100mm 45° ED-APO Binoculars with Interchangeable Eyepieces

    Lunt Engineering - 100mm 45° ED-APO Binoculars with Interchangeable Eyepieces

    This binocular is made for very high power use up to above 100 power.

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    Model#: APM100ED-BINO
    $2,950.00

  8. 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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    (48 States)
    Model#: ES-ED0806-01
    $729.99

  9. Explore Scientific - ED80 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED80 Air Spaced Carbon Fiber Triplet Refractor Telescope

    This 80mm f/6 ED Apochromatic triplet is an air-spaced triplet refractor telescope for observing and photography of celestial objects.

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    (48 States)
    Model#: EDT-0806-CF
    $1,149.99

  10. Explore Scientific - ED127 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED127 Air Spaced Carbon Fiber Triplet Refractor Telescope

    The Explore Scientific 127mm f/7.5 Air-Spaced Triplet ED APO produces a visual experience that is often compared to much larger aperture reflector telescopes.

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    (48 States)
    Model#: EDT-127075-CF

    Regular Price: $5,556.99

    Special Price: $2,499.99

  11. Explore Scientific - ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific - ED102 Air Spaced Carbon Fiber Triplet Refractor Telescope

    Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass developed and manufactured by Hoya Optical of Japan.

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    (48 States)
    Model#: EDT-10207-CF
    $1,729.99

  12. Explore Scientific - AR127 f/6.5 Air-Spaced Doublet Achromat Refractor

    Explore Scientific - AR127 f/6.5 Air-Spaced Doublet Achromat Refractor

    AR127 f/6.5 Air-Spaced Doublet with EMD Coatings; Deluxe Two-Speed 2-inch Crayford Focuser; Cradle Rings with Handle and Vixen-Style Dovetail Mount; 8x50 Straight Finderscope; Enhanced 99% Reflective 2-inch Diagonal with 1.25-inch Adapter

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    (48 States)
    Model#: DAR127065-01
    $599.99

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

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

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

    Starts shipping approximately late August.

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    (48 States)
    Model#: PN21038-HRCC

    Regular Price: $2,000.99

    Special Price: $899.99

  14. Explore Scientific - 152mm f/6.5 Achromatic Optical Tube Assembly

    Explore Scientific - 152mm f/6.5 Achromatic Optical Tube Assembly

    The AR152 (six-inch), with its larger aperture optics gathers 44% more light over the AR127 (five-inch) model, providing much brighter images and higher resolution

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    (48 States)
    Model#: DAR152065-01
    $749.99

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

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

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

  16. Celestron - Rowe-Ackermann Schmidt Astrograph OTA

    Celestron - Rowe-Ackermann Schmidt Astrograph OTA

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    (48 States)
    Model#: Rowe-Ackermann Schmidt Astrograph Optical Tube Assembly
    $3,499.00

  17. Celestron - Omni XLT 150 OTA

    Celestron - Omni XLT 150 OTA

    Omni XLT series features the stable platform of the CG-4 mount and high quality optics. ... Learn More
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    (48 States)
    Model#: 31057-1
    $299.95

  18. Celestron - Omni XLT 120 OTA

    Celestron - Omni XLT 120 OTA

    Globular clusters, close binary star pairs, lunar and planetary images, will delight and amaze you! ... Learn More
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    (48 States)
    Model#: 21090-1
    $499.00

  19. Celestron NexStar 6SE Optical Tube Assembly

    Celestron - NexStar 6SE 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

  20. Celestron EdgeHD 925 Optical Tube Assembly

    Celestron - EdgeHD 925 Optical Tube Assembly

    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.

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    (48 States)
    Model#: 91040-XLT
    Summer Imaging Special! Ends 8/31/14

    Regular Price: $2,299.00

    Special Price: $2,069.00

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