I have had my Canon Rebel XSI for awhile now, I know how to use it in nearly all the settings, but recently my pictures haven't been as crisp in my opinion. I normally use "manual focus" but sometimes use "auto focus." Here is a picture that doesn't look crisp to me: Link to Picture Not a great picture obviously but took this to use as an example. To make matters worse, I took off my lens to take a look inside and somehow I managed to scratch my mirror in the process, while I know this doesn't affect pictures it's just a minor annoyance. But back to the main subject, it just hasn't been taking as crisp pictures of late. Do you guys see what I am seeing or am I just going crazy? If you have any suggestions please feel free to give them.