I picked up a used 18-140mm for a walk around, having heard that it is pretty sharp for an inexpensive kit lens. Well, the one I got is about as sharp as a butter knife. I wasn't expecting tack sharp, but this is pretty bad. Maybe I got a bad copy. My Tamron 17-50 is a zillion times sharper, and I got it used for about the same price. So sad. Nothing to do but cry. My rant ends here. Time to move on.