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Message: <blockquote data-quote="eurotrash" data-source="post: 109769" data-attributes="member: 9237">I do realize that the DOF is razor thin at f1.4, don't get me wrong.. That probably has a lot to do with it. I'm willing to bet money that if I stopped down to say, f4 or even a little lower, that it would have been fine.. I don't think I'd ever realistically shoot say, racecars at f1.4 unless they were standing still and I was focusing on a very particular portion of the car..Back on track however, it seems that if I shoot charts or very static objects on a tripod, the pictures come out great and in perfect focus. The second I pick up the camera, things seemingly go haywire for some reason. At f1.4, my shutter speed should negate any movement effects. I do keep my eye on that as well. So the question is still in a real-world scenario, what is happening to shift the focus away from the point that I want?One very obvious flaw here is the focal point itself. Could it be that the focus point encompasses an area of the subject that is large enough to where it grabs the closest thing IN that focal point? Randomly? For instance, if I shoot a person's head at a few meters away and there is another person right behind the subject.. If the focal point area I've selected is larger than the subjects head is it possible that it will simply shift focus to the person directly behind the intended subject?</blockquote>