William Optics ZenithStar 103 f/6.9 Doublet Refracting OTA Telescope

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  • Regular price $1,198.00
  • William Optics ZenithStar 103 f/6.9 Doublet Refracting OTA Telescope

    • Sale
    • Regular price $1,198.00
    • ITEM #

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      ZenithStar 103:
    • An f/6.9 FPL53 Doublet Air-Spaced APO
    • Housed in a CNC Machined Ultra-High Precision Lens Cell
    • An x 0.8 Flattener
    • 2.5-inch Rack-and-Pinion Robust Focuser, Dual Speed = 1:10
    • There is no image shifting!


    William Optics ZenithStar 103 f/6.9 Doublet Refracting OTA Telescope

    We are very excited to announce New 2018 Super ZenithStar 103 (4.06-inch) aperture f/6.9 imaging APO! The ZenithStar 103 is made in three colors: Gold, Blue, and Red. It has an innovative Bahtinov Mask Cover (Patented) included!

    This beautiful scope is everything you always wanted in a refractor, starting from extreme sharpness for clear details, and APO color correction. It has all the benefits of the ZenithStar family at a price that is truly unbelievable.

    The William Optics ZenithStar 103 Features an f/6.9 FPL53 Doublet air-spaced APO, in a CNC machined ultra-high precision lens cell.

    An f/5.5 with x0.8 Flattener. 2.5-inch rack-and-pinion ultra-robust focuser with 1:10 dual speed

    A treat to use for astrophotography. There is no image shifting!

    Heavy duty: perfect for your accessories.


    The Do-all instrument: Despite its 103 mm objective, the scope is still very compact and solid. Many airlines will accept it as carry-on luggage! Perfect size for serious observations of deep sky objects and planets. Solar observations possible with proper additional equipment.



    Aperture103 mm (4.06")
    Camera/Eyepiece Connection1.25" Nosepiece
    Dawes Limit1.13 arcseconds
    Focal Length710.7 mm
    Focal Ratiof/6.9
    Free ShippingYes
    Glass TypeFPL53
    Hightest Magnification206x
    Light Gathering Power217x
    Limiting Magnitude13.8
    Optical DesignDoublet
    Tube Diameter112mm
    Tube Length615mm
    Tube Weight9.61 lbs
      Standard Package:
    • Mounting Rings
    • Guiding Rings
    • CNC Carry Handle Bar
    • Long Vixen Style Dovetail Plate
    • 2.5-inch Rack-and-Pinion Focuser
    • Innovative Bahtinov Mask Cover (Patented)
    • Two-year, no fuss warranty and constant customer service!


      Optional Accessories:
    • M63 to 2-inch Rotolock
    • 1.25-inch Rotolock
    • All New 50 mm:  f/4 Rotolock Guide scope
    • New Full frame x 0.8 Flattener
    • Soft Carry Case


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