Many photographers don’t know it, but Canon used to produce a 50mm lens with a F1.0 aperture. Yes, one-point-zero. At the time, this was the fastest SLR lens in production. While it was being made the lens retailed for $4,210. In 2000 the lens production was stopped and was eventually replaced by the F1.2 version. Why? The lens actually wasn’t very good… except for the bokeh.