Hi I'v been using SONY A7SII for over a month. it is a great camera in many ways. except the 8-bits 4:2:0 internal recording. But I think it is the necessary tradeoff. because if you sonsider the marketing role and the consumer affordable post editing for 4K .
back to my question. I found the histogram of SONY a7SII acts differently in different picture profile. I mean, If you apply PP7/PP8 or PP9 (in other words, you shoot in S-Log2 or S-Log3). The Histogram it can show is constrained, I mean even it you over expose, the range of histogram is limited,. (please check this https://w