The Leica ELPRO-S 180mm Close-Up Converter Lens is a precisely calculated adapter specifically designed for the Leica APO-Elmar-S 180mm f/3.5 lens. It reduces the minimum focus distance of the 180mm lens to 3.6 ft. (1.1 m) and increases the maximum reproduction ratio of the lens from 1:7 to 1:4.5.
The Leica ELPRO-S 180 attaches to the threaded filter mount of the lens, just like a filter. Autofocus, exposure metering and all other camera and lens handling functions are maintained in full when using the Leica Elpro-S 180.