The Askar 80PHQ 0.76x full-frame reducer features a 3" triplet design specifically for the 80PHQ. When used with the 80PHQ f/7.5 astrograph, it reduces the focal ratio to f/5.7 and focal length to 456mm, effectively shortening exposure time and dramatically increasing field of view. Standard 55mm back focus with multi-functional four-piece photographic adapters and built-in M48×0.75 2" filter thread.
