This Skywatcher Coma Corrector (2") for Newtonian Reflectors is optimised for use with fast Newtonian systems of f/5 or below. This 2-inch fitting accessory does not magnify or reduce the focal length of a system, but substantially reduces edge of field coma that is prevalent in low focal ratio Newtonians - delivering pin sharp images for both photographic and visual use. Although designed principally for the Skywatcher PDS range, this Coma Corrector can be used on many different manufacturer's Newtonians for similar focal length - including the Revelation Newtonian f/4 range - with great results. Get the most out of your telescope with this great value corrector - a must for all those who demand more from their imaging and observation!
Please note, that a separate T-ring, suitable for your particular camera, will be needed when connecting a DSLR to this accessory. Supplied with suitable adaptors for visual use.