Originally posted by svassh Plenty of professional reviews that call the Canon sharp across the frame at 2.8 haven't seen any Pentax reviews making that claim unless stopped down to 4 or 5.6.
I do have the DFA70-200, and I can tell you that this is not true at all. My DFA70-200 is tack sharp wide open, I don't see sharpness improved stopping down... I did a test to see if I could shoot wide open, I did not see a difference, so I shoot wide open all the time, without any holding back. I had other versions of 70-200, definitely not as sharp as my DFA70-200.
---------- Post added 07-02-17 at 06:26 ----------
Originally posted by svassh In full disclosure I was previously an owner of the Canon 70-200 2.8 II with a Canon 1DX so maybe my expectations are not fair.
Did you make a mistake going Pentax? What happened to you?