The Fuji Film PSZ-Fujinon 1:1.3 f=15-25mm Zoom Converter is a vintage teleconverter lens designed specifically for the Fujicascope M3 camera. Made by Fujifilm in Japan, this converter allows for a 1:1.3 optical magnification, effectively increasing the focal length of the lenses in the Fujicascope M3 for a more precise zoom capability. Perfect for photography enthusiasts looking to expand the versatility of their Fujica camera system, this converter is a valuable addition to any vintage lens collection.