I tried to find the most applicable category for this question, so please forgive me if I've made a forum boo-boo.
I've had this focusing problem for a while now, and its bugging the heck out of me. If I'm shooting people, for example, I can never get their eyes in focus. It seems like the most intimate portraits have the subject's eyes in crisp focus, but when using a wider angle and a so-so slr viewfinder (I'm using a digital rebel and canon 17-40) I just don't know what to do.
Can anybody help me with my focusing problems? From what I've read about medium format photography, cameras like Hasselblad apparently have some sort of magnifier in their viewfinder to solve this very problem. What can I do? Thanks for all your help.