S Mount

CANON 50mm f/0.95

CANON 50mm f/0.95
Marketed August 1961
Original Price 57,000 yen
Lens Construction (group) 5
Lens Construction (element) 7
No. of Diaphragm Blades 10
Minimum Aperture 16
Closest Focusing Distance (m) 1
Maximum Magnification (x) --
Filter Diameter (mm) 72
Maximum Diameter x Length (mm) 79 x 47.8
Weight (g) 605

This lens is developed as one of the standard lenses for the Canon 7 rangefinder camera. 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.