82mm, f/5.8, 477mm focal length 55mm back focus 36mm illuminated field Includes one ED element M56x1 female / M48 male threads Includes rotator/adapter with built-in cavity for 2-inch filters
Description
0.9x thread-on reducer/corrector produces a flat field across the entire image while shortening exposure time by 24%. Optimized for Evolux 82mm refractors.