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.

• 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