Thanks ever so much for your response and useful info. I have one more question if you might have some preliminary thoughts. my question will be simplified to keep it basic. Say at a mid distance range to subject, with the Zeiss set to f2.8 (wide open)….how would it compare both centrally as well along the sides/edges of the frame to the new VC 21mm when tis used both wide open and at f2.8. Any info to some of this would be important to my potential use of the new VC 21mm. Thanks again Bill!
Dave (D&A)