William Optics ZenithStar 103 f/6.9 Doublet Refracting OTA Telescope

No Reviews yet.
  • Price:
  • Sale
  • Regular price $1,198.00

Free Shipping
Already have gear? Trade it in for cash or new equipment.

Accessories Added

    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")
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



Have a Question?

Be the first to ask a question about this.

Ask a Question