1. Do u use battery grip?
2. Can I mix up 1st and 3rd party BP511 in battery grip?
3. How much is the remote cable control? Do I need to get the one with timer?
4. When using flash at Av mode, how to determine a suitable shutter speed? I found the shutter speed never changes whether or not flash is on. Under some situations, e.g. white backgroud (wall), the whole picture is washed out. Even if I when to increase shutter speed, it stops when exposure compansation reaches -2. So how?
2. Can I mix up 1st and 3rd party BP511 in battery grip?
3. How much is the remote cable control? Do I need to get the one with timer?
4. When using flash at Av mode, how to determine a suitable shutter speed? I found the shutter speed never changes whether or not flash is on. Under some situations, e.g. white backgroud (wall), the whole picture is washed out. Even if I when to increase shutter speed, it stops when exposure compansation reaches -2. So how?