Coma Free Newtonian / Dobsonian

This big GSO Newtonian reflector features a parabolic primary mirror with 94%-96% reflectivity.  Coma is an inherent property of telescopes using parabolic mirrors.  This results in an image that is not in the center of the field looking wedge-shaped. This causes stars to appear to have a cometary coma in traditional Newtonian reflector.

Built in GSO Coma Corrector is optimized by 3 elements fully coated lens, providing pinpoint stars to the edge of the field with no increase in magnification.  We pursue the optical performance beyond everything. We provide the excellent optical performance with affordable price.