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Review title: Worst focusing I've seen
Product review: I did only about 30 test shots with this before deciding to return it. Not one picture was in focus. I do know enough about depth-of-field to rule that out as the problem. Even at f/2.8, there should be some sharp feature somewhere within the focus rectangle in the viewfinder. There wasn't. Not even once. I've never had this problem with any other lens, ranging from expensive Nikkor primes and zooms to inexpensive Tamron ultrazooms. Lenses have to work, straight out of the box. This one didn't.
