SkyWatcher Quattro Coma Corrector.
. . The SkyWatcher Coma Corrector is a Quattro series Coma Corrector which delivers stunning wide-field views with pinpoint stars to the edge of the field without altering the magnification. The corrector enables users to achieve tack-sharp focus with true color rendition across the entire field of view, especially at the edges. It fits into 2" focusers and requires a backfocus of 55mm (2.16"). This corrector is made with extra-low dispersion (ED) FPL51 and Schott glass with a fast f/4 focal ratio for imaging.
Filed under: Eyepieces & Accessories