Originally posted by matix In the Custom Settings, set the Link AF Point and AE to on or 2
This ensures that the flash exposure is on the focal area and not on some reflective bright spot somewhere else in the frame, or even from jewellery or the reflection from an eye.
Worked for me, and I went from a 1 in 10 success rate to 9 out of 10, I was close to tossing the camera and flash, that was a year ago.
Never helped me and my 540.
From what I have heard, the 360 is much more accurate.
The 540 seems to be quite consistent for everyone, but for MANY people (including myself), it consistently underexposes even in situations that should result in gross over exposure (spot metering on a matte black object, for example.)
I wound up keeping my 540 because mail-order returns and exhanges are a pain and most of its deficiencies can be worked around, but more often than not I wind up using it as a manual optical slave for a Vivitar 285HV. Knowing what I know now, I would have bought multiple (extra) 285HVs and triggering equipment instead of the 540.