3-inch 0.76x full-frame reducer with a triple design, specifically for the 80PHQ, which reduces the focal ratio by 0.76x when used with the 80PHQ F/7.5 astronomy camera.
The focal ratio is 5.7 and the reduced focal length is 456mm, which effectively shortens the exposure time, greatly increases your field of view, and brings more convenience and possibilities to your deep-sky astronomical photography.
The end of the focuser is a versatile four-piece photography adapter that attaches to the end threads of the focuser when in use. Back focal length is standard 55mm. It also features built-in M48X0.75 (2") filter threads, allowing you to easily screw on the filter.