Canon 50mm f/0.95 Range Finder - Sony FE Fit

It had the largest aperture in the world for photographic lenses available in the market at the time. It attracts a great deal of attention as a “dream lens”, as it is four times faster than the human eye. The lens mount is clip-on, 3-lug bayonet system like the Mirror Box II (cameras have S mount inside bayonet mount). The edge of the rearmost lens element is cut off to avoid friction with interlocking roller of range finder mechanism. It is Gauss type lens with 7 elements in 5 groups.