Sharpstar f/4.4 Full-Frame Focal Reducer for 61EDPH-III
This 0.75x, full-frame reducer for the Sharpstar 61EDPH-III reduces the focal length of the system to 270 mm, for a reduced focal ratio of f/4.4. This reducer adopts a 4-element, air-spaced, quadruplet lens configuration, with support for full-frame camera sensors. The lenses have full-surface, multi-layer coatings. In all, this reducer is a great choice when photographing deep sky objects.
One end of the reducer attaches to the focuser of the 61EDPH-III via M68x1 threads. The other end features M48x0.75 threads, with a built-in 2″ filter thread. The reducer provides a standard backfocus of 55 mm.
