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

    Explore Scientific - ED127 APO 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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    Model#: EDT-127075-CF
    WOW!! Explore Scientific 25% OFF Holiday Sale! ENDS DEC. 30th

    Regular Price: $2,499.99

    Special Price: $1,874.49

  2. Explore Scientific - ED 152mm 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 *

    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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    Model#: TED15208CF-C3
    WOW!! Explore Scientific 25% OFF Holiday Sale! ENDS DEC. 30th

    Regular Price: $4,999.99

    Special Price: $3,749.49

  3. 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

  4. 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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    Model#: EDT-10207-CF
    WOW!! Explore Scientific 25% OFF Holiday Sale! ENDS DEC. 30th

    Regular Price: $1,729.99

    Special Price: $1,297.00

  5. 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

  6. 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
    WOW!! Explore Scientific 25% OFF Holiday Sale! ENDS DEC. 30th

    Regular Price: $1,149.99

    Special Price: $862.00

6 Item(s)

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