I have noticed that there is a difference in the metering accuracy among several different Nikon bodies. I have been switching between center weight and Matrix metering for some time between several different Nikon bodies. I performed a few "field experiments" (out in the open under same lighting, same lens, same location, silde film, not in a controlled lab) and noticed the following. My F100 and N80 used in Matrix metering seem to underexpose by one or two stops. When turned to center weight metering they appear to over expose by a stop. However, when I use my F2A or F3, the metering is right on target, the F3 being more accurate of the two. Is this because the center weight ratio on the F3 is 80/20 vs. 60/40 on the others? To complicate matters even more I have compared the metering of my F3 with some of my Nikon digital cameras (D1X, D70s, and D200), and the results were surprisingly the same! Matrix metering on my DSLR's underexposes by two stops or more while centerweight overexposes by a half stop or a stop compared to the F3. Does this mean that the F3 has the "perfect" metering ratio of 80/20? Could there be the remote possibility that the images displayed through the viewfinder in all of my Nikon bodies (except for my F3 and F2A) do not "see" 100% of the actual image, therefore the slight added information on the final frame has more or less light than what the meter saw through the viewfinder? I know that after shooting several rolls with each camera you get to know what to expect, thereby adjusting your shooting method (manually overexpose/underexpose the shot in advance when needed). I am just curious about metering accuracy and why it seems to be that the F3 is much more accurate more times than any of the other Nikon cameras I have.