I learnt some time ago not to trust the the histogram. How you customise the camera affects the histogram, and in a studio, when using high key or low key lighting the background overpowers the rest of the scene affecting the histogram.
Recently I was watching a video on Kelby Training by Frank Doorhof called “Why Fake It When You Can Create It”.
In it the fashion photographer Frank Doorhof covered some aspects of metering in the studio using a flash meter. Great stuff, and I cannot recommend it enough.
Gives me a few ideas to try out when I am in the studio tomorrow.