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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. Vixen - 81mm ED81S (f/7.7) ED Apochromatic Optical Tube Assembly

    Vixen - 81mm ED81S (f/7.7) ED Apochromatic Optical Tube Assembly

    When The ED81S was introduced , it set a new standard for APO Refractors. The combination of better color correction from the new ED glass and brighter images from its fast f/7.

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    Model#: 5864
    30% sale while supplies last!

    Regular Price: $1,499.00

    Special Price: $1,049.30

  2. Vixen - 103mm ED103S (f/7.7) ED Apochromatic Refractor Optical Tube Assembly

    Vixen - 103mm ED103S (f/7.7) ED Apochromatic Refractor Optical Tube Assembly

    The newly designed high definition ED lens in Vixen's ED103S Refractor gives excellent optical performance in a short optical tube for easy handling.

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    Model#: 5865
    27% sale while supplies last!

    Regular Price: $2,199.00

    Special Price: $1,595.00

  3. Vixen - 115mm ED115S (f/7.7) ED Apochromatic Optical Tube Assembly

    Vixen - 115mm ED115S (f/7.7) ED Apochromatic Optical Tube Assembly

    The astro-photographer will be especially pleased with the high contrast images through this telescope and the full objective diameter of 4".

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    (48 States)
    Model#: 5866
    $2,999.00

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