I have the 35mm f2, 28mm f2, 24mm f2 and 20mm f2.8 FDs and I find them all to be good performers, but reading through this thread it makes me wonder how much variation there can be between different lenses of the same focal length and aperture and if my 24mm f2 is giving the same performance as yours, and how valid these comparisons are after about twenty five years since they were manufactured