Leica M240 vs M9 vs Sony A7R Lens Combination Review » D!RK
I have found the edges of the Sony a7r soft on all M-mount lenses less than 50 mm. My 50 f/2 Planar seems excellent, as does the 75 Summarit. I am most interested in the comment that the ZM 21mm f/2.8 had sharp edges. Were they as good as on the ......