Ok this is same as what i encountered. I shot with f2.8 at grass in front, bush and tress behind. Photos turned out to be so blur.![]()
See the above pic taken at f2.8. Is it sharp? I'm not sure, maybe must look at my original file. When i purchased my Tamron, i just check for front focus issues. I took a few photo shots from f2.8 to f11 for testing. I'm not a pro, so i'm not sure what type of sharp are you looking at. But for me, as long as the pics are relatively sharp and reasonable, i'm fine.
If you chance upon the Canon 17-55 and make a comparison, you will think that Canon is sharper. Why make ourselves so miserable over the so-called sharpness, just enjoy the hobbies and take more shots. Otherwise, after a while and you see another so-called sharp lens, you will make comparison and felt miserable again.
I got quite shocked how come this expensive lens can't even get sharp image quality like my 3 year-old pns sony camera.
Ok now i think i know....i must go out and shoot with f4.5 and above to get sharp image. But then..what's the point of this piece of expensive lens?? Even 18-55mm VR kit lens can do better. Or this lens is supposed to be used for portrait shots with bokeh only?