The Explore Scientific HR Variable Coma Corrector (2-inch) is a high-performance optical corrector designed by Harrie Rutten to minimize or eliminate the comet-like star shapes that coma introduces at the edge of a Newtonian reflector's field. Works Even on Fast Newtonians: Its marked spacer allows use on almost any Newtonian telescope with a parabolic primary mirror, including fast scopes like the BRESSER N20839 f/3.9 Photo Newtonian. EMC Coated Optics: Reduces internal reflections for cleaner images. Secured by Three Thumbscrews: Comes with two adapters (M42x0.75 and M48x0.75) to secure to your T adapter, plus a protective cap. Item Number HRCC02-00 Weight 1lb (.45kg) Diameter 69.3mm Height 147.2mm Warranty 1-year limited, converts to Explore STAR Transferable Extended Life Warranty if registered within 60 days
