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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 for any DSLR, and pristine clarity for both visual observers and astrophotographers. This scope series is even capable of handling full frame sensors.
This air-spaced 81 mm series utilizes FPL-53 glass to provide clear detail and sharp colors. Similar to past models, this series also includes a 10:1 dual speed, 2.5-inch, R&P ultra-robust 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.
These OTAs include a dual-side dovetail compatible with Vixen and Arca Swiss stylings.
- 0.8x Flattener/Reducer
- Mounting Rings
- CNC Carry Handle Bar
- 2.5" Rack & Pinion Focuser
- Dual Sided Dovetail
- Bahtinov Mask
- Carry Case
- Aperture: 81mm
- Glass: FPL-53
- Focal Length: 559mm
- Focal Ratio: f/6.9
- Focuser: 2.5" Rack & Pinion Dual Speed Focuser
- Tube Length: 460mm (Fully Retracted) and 560mm (Fully Extended)
- Total Weight: 3.53kg (7.78 lb)
- Image Circle: Full frame
- Warranty: William Optics 2-year