finch13
Well-Known Member
Haha. If you can find the metal MkI, go for it. I thought mine was losing sharpness too because I dropped it, but I'm almost positive it's just because 1.8 is a huge aperture and the light entering the lens is extra unorganized (compared to your average f/3.5 maximum aperture lens). Apertures between f/8 and f/11 are usually sharpest in the lens' aperture range, so you lose you low light speed to gain sharpness.
16/2.8, 28/2.8, 28/2.5, and 3 50mm's at f/2, f/1.7, and f/1.4