I'm trying to figure out how to shoot these little guys- Side-blotch lizards. This one is about 4 inches long and about as close as I can get to them without catching them (about 4 feet). Anyhow, I'm trying to use some of the things I've read on the forum to do it; Larger aperture (f5.6) Auto focus (usually drives me nuts). So here's what I see as the problem; I try to focus on the eye/head (in the bracket). I pull back keeping the button held down half way, compose and shoot. I keep losing the head. Would a smaller aperture help? I notice I have the sharpness on the camera set to 'hard' (Nikon d70), does that matter? Any ideas?