I have taken thousands of shots with this lens, but almost exclusively at f5.6 - 6.3. rarelt going much higher or lower. I had tried a few F4 shots and was disappointed in the dramatic softness compared to 5.6. But Saturday I decided to shoot exclusively at F4.5 just for fun.
I was shocked, to say the least. I really wasn't expecting sharp, more like almost there but not quite.
For f4.5 I am impressed. Sadly I lost grip of the camera and it dropped and broke the hood. which I will have to save up $50.oo for now. Electrical tape is holding it together, but I am going to have to make a loop to go around my wrist.
Anyone on the fence about this lens should have no fear