Central sharpness is outstanding from f/2.8 to f/5.6, excellent from f/8 to f/16 and still very good at ... The taller the column, the better the lens performance. CA (Chromatic Aberration ...

If it is sharpness we seek, then this is our lens. Centrally, sharpness is excellent from f/1.4 right through to f/11, and still very good at f/16. The edges are exactly the same, excellent from f ...