bwud said:
Here is the relevant documentation
This is a horrible setting (at least, for me).
If you set it to Viewfinder, it's always ONLY on viewfinder, and there is never anything on the back screen, which means you can't check your exposure setting unless you look into the viewfinder (since there's no top LCD).
If you set it on Monitor, the viewfinder NEVER works. And who wants that?
What I really want is Viewfinder + Monitor so that you can force both to be powered at the same time, and never powered off unless it goes into sleep. It is ok for the monitor to have the basic exposure settings only. Frankly, I don't want most of the do-dads on the back display that Sony shows, like the electronic level and all that. Just mode (M/A/S/P,C1/etc.), aperture, shutter, ISO, drive mode, focus area, flash/hss, EV+/-, and shots left.
Also, some high performance, battery-eating, viewfinder mode where it never shuts off unless I turn the camera off, because in wildlife photography, the fraction of a second between black viewfinder and seeing something is precious time lost. I can always feed the camera another battery.