Curtis N wrote in post #3849117
I'm not Suzy, but I'll ask anyway.
How did you calibrate the meter for your camera in the first place? Or did you calibrate it at all? It seems strange that it would be a full stop off from a gray card reading. I mean, isn't that the whole reason gray cards exist?
I light meter will probably be my next gear purchase. I read about the more expensive ones being able to store calibration settings for more than one camera... or something like that.
Well, Suzy, I mean, Curtis, the reason for the discrepancy, I think, is because the meters, both the handheld and the one in the camera, are calibrated for 12% gray instead of the 18% gray that everybody takes to be mid-gray. This is also the reason the histogram of an 18% gray card is just left of center instead of smack dab in the middle of the histogram. Shoot a 12% gray card and the spike will be in the middle of the histogram.
BTW, I did not calibrate my meter. For reflective metering, the meter and the camera both show the same results so there's really no need to fiddle with the calibration.