The revolutionary William Optics AFR-IV Adjustable Flattener and (0.75x-0.8x) reducer is made for 500 to 1000 mm refractors, including the William Optics FLT98, FLT110, FLT132, and others. This 2-element, 2-inch is black-anodized for durability and beauty. All internal surfaces are blackened to eliminate reflections.
The WO AFR-IV Flattener has a rotating t-ring thread that will accept any standard t-ring for your camera. The included T-ring adapter comes with a locking screw and extra retaining screws. This field flattener inserts directly into a 2-inch focuser. It is easy to set the optimum back focus distance...just twist.
William Optics AFR-IV Flattener Highlights: