I am doing my first Wedding this Sunday and the rehearsal was last night. I tested a few shots with the bridal girls walking down the hallway. I was using a 10D and a 24 -70 at 5.6. All the photos came out not in focus or not very sharp. How do you all manage this while with moving people during the ceremony (walking) My lens are 50 1.4, 17 -40 and 24 -70. Should I use the 50 mm when they walk down, I heard the 24-70 is soft at F4. The ETTL results were scary as well.