This confuses me. If I use a handheld meter and apply the meter settings and then open the aperture 1/3 stop. How is that different from applying the handheld meter reading and opening 1/3 stop via the ISO dial?
EDIT: And therefore it doesn't matter what the ISO dial is set at.If you are using a handheld meter, set that meter at ISO 125 and use those readings.
But leave the ISO setting on the camera at 160, right?
I am not using the camera's meter.If you are using the meter in the camera, and it is a TTL meter, simply screw the filter on and continue using the 160 setting on the camera's ISO dial.
I'm not using two meters. I'm not 100% sure what "two settings" you're referring to. I can program my meter for two ISO settings, 'A' and 'B.' So I could program 'A' with ISO 160 and 'B' with 125. This could be used to more easily meter. One setting for when filter is off, one for on. Maybe that's what you're referring to?Why are you using two meters and two settings?
I'm using a Zeiss Ikon ZI and a Pentax Super ME.What camera are you using?