I've been reading a lot of forums and have seen the suggestion about back button focusing. I tried that a couple of days ago and again yesterday. I seemed to have great success with it intially, buuuut I feel like I took a step backward yesterday. I took a couple hundred shots of DH and his dirtbike (posed, not action) and I had a difficult time focusing on his face. After looking at the pics on my computer I noticed often times the focus fell on his chest or forearms. How is that happening when I lock focus on his face and he's not moving? Do I need to hold the back button DOWN until I take the picture? Do you have any more tips? I pressed focus, recomposed, and then snapped. I think about 3/4 of the pictures were not focused on his face. I'm growing so frustrated. HELP!?! I am using a Canon XSi, 50mm 1.4 and am using option 1 in the command. I have my focus mode in "one shot" (not AI servo, etc). Where am I going wrong??