This KIPON Baveyes Focal Reducer Pentax 67-XD 0.8x reduces the focal length by 0.8 and multiplies the focal length by 0.8 based on the original lens, so the effective focal length becomes shorter and the shooting range is larger. Three built-in groups of five optical lenses increase the aperture by one stop, and the focal length multiplies by 0.8 (equivalent focal length equals the actual focal length crop factor 0.8) based on the original lens, such as f/2.8 turned to f/2, so the depth of field is more attractively blurred.
KIPON applied a 0.8x optic telecentric design to let the light come into the digital sensor vertically as far as possible. For some lenses, lens quality could improve after using a 0.8x focal reducer.