The Fujinon WCV-80C 0.8x Wide Converter Lens clamps onto a Fujinon lens with a front-side diameter of 80mm and multiplies the focal length by 0.8x on the wide side. The WCV-80D will not interfere with the lens' ability to zoom and the F-Number will remain unchanged. The converter will also decrease the lens' minimum focus distance. Type | 0.8x Wide Converter | Mount | 80mm diameter clamp-on | Zoom Through | Yes | Weight | 2.27 lb (1.03 kg) | |