F4 Aplanatic Coma Corrector Only for use with F4 Newtonian. The Sky-Watcher 2” F4 Coma Corrector is designed to overcome the vignette effect in Newtonian telescopes. This allows you to see pinpoint stars across the whole field of view. Magnification remains the same. It helps Astro-imagers improve their photos of the sky. It's optimised for all Sky-watcher fast ratio (f/4) Newtonian Reflectors with 2” focusers. You’ll need to purchase the appropriate adaptors for connecting to your DSLR camera. Sky-Watcher 2” Coma Corrector Features Coma Corrector (2″) for Newtonian Reflectors Optimised for all Sky-Watcher fast-ratio f/4 Newtonian Reflectors with 2″ focuser Delivers stunning wide-field views with pinpoint stars to the edge of the field Magnification remains unaltered
