Why do all my pics seem 'soft'? They are never crisp and clear, and it seems that no matter what I try (changing aperture, shutter, etc) my pics seem soft, and when I think I'm focusing on one thing, its generally something else that's in focus. I thought I set my 'diopter' (the dial above my eyecup) but maybe that's the problem?? This seems to happen on all of my lenses, not just my 50mm. Is it my camera? (pentax k100d) Any help, suggestions would be MUCH appreciated! Thanks!