The Askar new 3 inch 0.76x full frame reducer,with a triplet design and specifically for the 80PHQ, offers a 0.76x reduction in focal ratio, when used with the 80PHQ F/7.5 astrograph,the focal ratio is 5.7, and the reduced focal length is 456 mm, effectively shortening the exposure time and dramatically increasing your field of view and bringing more convenience and possibilities for your deep-sky astrophotography.