At 12mm, central sharpness is excellent from f/2.8 right through to f/11 and very good at f/16 and f/22. The edges are very good at f/2.8 and f/4, excellent from f/5.6 to f/11, very good at f/16 ...
It is still very good at f/16 and good at f/22. The edges are excellent from f/2.8 to f/11, very good at f/16 and softening at f/22. At 100mm, central sharpness is excellent at f/2.8, outstanding ...