I just got a Canon 50mm f/1.4 lens. It's my first prime lens, but I am really enjoying it. What I don't understand is why I'm finding it so very hard to get a really sharp photo. Granted, my little nephew does move around a lot, but the othe day, even when he was sitting still and I tried all sorts of adjustments, most of my photos were just not crisp. Is this a function of my inexperience with this lens or something more basic? Thanks!