Leica Elmarit-M 28mm f/2.8

A wide-angle prime for Leica's M-mount system, first introduced in the 1960s and revised through several optical formulas. The current ASPH version uses an aspherical element in an 8-element design and weighs just 175 grams, making it the most compact lens in the M system. It focuses down to 0.7 meters and accepts 39mm screw-on filters.