mnealtx wrote in post #3539143
My understanding was that the spike should be dead center in the histogram - is that incorrect?
Since PacAce said it didn't have to be a perfect 18% grey card.....then no, the spike wouldn't necessarily be at the center or left of center. It would mainly just have to have one spike that is "close enough to the center".
If you google grey card, you'll actually see many debates on whether 18% grey gives true 50% luminance....or if it's closer to 12%. So because no one can agree if 18% is truely 50% luminance or not.....IMO, as long as it's close to center, it's fine. Actually, when I tried typing in 50% luminance in PS's color picker, I got RGB and CMYK values that were slightly darker then "the recommended" values for 18%. So maybe it is true that 18% would be a little left of center.
But getting back to the OP....I totally agree with TMR. "Correct" exposure is a subjective measurement. To get the best exposure that you like, you have to be aware of how your camera's meter modes work. Sure, some cameras might actually have quirks....but they give you manual control and different metering modes for a reason.