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Model: wo-gt-81Brand: William Optics
The William Optics GT-81 DDG APO Triplet refractor features a 3-element f/5.9 objective with Japanese Ohara FPL-53 extra-low-dispersion glass for optimum color correction and an upgraded DDG 2-inch dual-speed focuser.
A matching 0.8x focal reducer is in the pipe-line which will reduce the focal-ratio to a fast f4.72
An excellent choice for astrophotography!
See this remarkable image from Nadeem Shah using a William Optics GT81 and Atik 383L Plus.
Aperture
81mm
Focal Ratio
F/5.9
Focal Length
478mm
Objective Type
Triplet FPL-53 Air Spaced Fully Multi-Coated, STM coatings
Tube Length
340mm Fully Retracted 400mm Fully Extended
Fitted with carry handle
Tube Weight
2.9kg
Backpack
Carry-on rigid backpack with custom-fitted foam.
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