The reflectance of the imaging device (CCD) is much different than film. This is the
reason that Nikon had to revise the SB-28 flash for use with DSLRs. I believe that the
final flash meter reading is taken from the front of the shutter curtain.
From: "Patrick White"
Um.. did I miss something? Why is this a requirement for flash on a
digital camera? Can't they use the equivalent to OTF sensing too?
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