Ap T Camera Excellent Buy Which Camera Settings With Canon 580 Ex Flash?

Which camera settings with canon 580 ex flash? - ap t camera excellent buy

that adjustments to the Canon 580 EX Flash Canon 5D, for the great depth of field? I have 580 in ETTL
when used with P, the camera tends to large openings in the use of AP to use, and then open the shutter stays too long. If I have to use M, manual i to measure the distance every time I or a moving object, and thus the first set, which works but takes too long, too.