I don't think the 50/2 replaced the 50/3.5. The f/2 lens was much more espensive. I have the f/3.5 and it is sharp at every distance and f/stop. If a normal lens will be used closed down and you are yearning for sharpness, get a medium format camera. If I use a Bronica GS-1 with the normal 100/3.5 lens I will expect to get a sharper 8X10, 11X14, 16X20 etc. than any standard lens with a 35mm camera can produce.