[Chan Tran]

I REALLY think he means to calibrate a meter that is not metering correctly even with the correct ISO and shutter/fstop settings.

AND that is the only way to do it.

I apologize if I misunderstood him. Just wanted to point him in the direction he would en up going if he tried to "calibrate" his "non-working" meter.

If so, just ignore my nonsense. BTW, what other "calibration" is there? :P

I am sorry because I am not familiar with this prism finder but are these adjustments that you're talking about are easy to get at? and do you know the function of each? and you can really get to the photocell and measure its resistance? Most cameras to do this would require quite a bit of disassembly.