Guy - as far as the sharpness - come on, you have to show us Big Bronco - we're big kids, we can handle it!
btw - to have expectations set properly, lenscore shows the C-Sonnar with a 695 resolving rating vs. 1037 for the 85GM. So, it's not expected to be 'sharp' but it would be interesting to see how that materializes with the Bronco to calibrate other results if nothing else.