Sky-Watcher 0.85x Reducer / Corrector / Flattener for 80ED
Sky-Watcher 0.85x Reducer / Corrector / Flattener for 80ED Black Diamond
Optimized for the Sky-Watcher Black Diamond 80ED viewfinder
0.85x focal reduction factor
Offers significantly improved field edge correction
€624.86
(VAT incl.)
Reference:
SW0182
Description
This accessory is necessary because the refractors (glasses) provide a curved focal plane, the stars are not point near the edges. The reducer / corrector provides a corrected image to the edge of the field. Screws directly to the bezel's crayford (M56 thread). Optimized for Sky-Watcher 80ED f / 7.5 Black Diamond glasses (Doublet), this screw-in reducer / corrector reduces the viewfinder's focal length by a factor of 0.85x (induced focal ratio of f / 6.375).
The use of a focal reducer in astrophotography also reduces the exposure time. You will need to use an M48 wide field T-ring dedicated to your camera, available from Sony, Nikon, or Canon.
CAUTION . Not suitable for Sky-Watcher ESPRIT 80ED glasses (triplet).
M56 female at the front
M48 male at the rear
55mm backfocus
English GB
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