I am pleased to report that I have successfully recalibrated my light meter. It does appear that the potentiometer on the right is a gain adjustment and the left one is offset.

After about 2 hours of work, my built in meter is spot on with my Gossen Luna Pro F throughout the full range of illumination. My Luna Pro was just calibrated by Quality Light-Metric in Hollywood. I highly recommend them.

So it can be done.

Quote Originally Posted by dbuchheit View Post
Can anyone advise me about the functions of the 2 potentiometers on the Yashicamat 124G light meter? I suspect one is gain and the other offset, but I could be way off base.

Mine reads too dark by about 4 stops. It appears that the switch works properly and I am using a hearing aid battery with adapter.

Yes I have a good hand held meter, but would like to get the built in meter working at least in the ball park.

Any help with adjustment would be appreciated.