William Optics ZenithStar 81 f/6.9 Doublet Refracting OTA Telescope - Red

Brand: William Optics


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  • Aperture: 81mm
  • Ideal for astrophotography.
  • Includes protective Soft Case.

Product Details

  • The William Optics ZenithStar 81 mm aperture Doublet APO Refactor is an extremely versatile telescope ideal for both astrophotography and general photography. It provides a sharp image to any DSLR, and pristine clarity for both visual observers and astrophotographers. This scope series is even capable of handling full frame sensors.

    Zenithstar Dimensions

    This air-spaced 81 mm series utilizes FPL53 glass for the clear detail provided and sharp colors. Similar to past models, this series also includes a 1:10 dual speed, 2.5-inch, R&P ultra robust focuser. 

    ZenithStar Focuser


    William Optics has crafted this series as an f/6.9 for respectable speed. On top of that, each scope in the series comes with a built-in, removable, clear Bahtinov mask for convenience in focusing. 

    ZenithStar Bahtinov Mask

    These OTAs include a dual-side dovetail compatible with Vixen and Arca Swiss stylings.

    ZenithStar Plate Design


  • specifications

    Aperture81 mm (3.25")
    Focal Length559 mm
    Focal Ratiof/6.9
    Free ShippingYes
    Glass Type53
    Optical DesignDoublet Refractor
  • included items

    • ZenithStar 81 Telescope
    • Protective Soft Case

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