I'm trying to slowly work up a bunch of notes on Canon cameras. I've mentioned this before in this forum. I've never really thought about it before but the shutter button on this camera and I think every Canon camera I've ever owned can be set to "AE lock (while button pressed)". On the R5 Mk II, this setting can only be put on the half press of the shutter button.
I didn't realize this but "metering" is active all the time. I set my camera to manual mode with auto ISO and as I pan around, the ISO is changing without me touching the shutter button. It doesn't matter how the half press of the shutter button is programmed. Without touching the shutter at all, the ISO changes as I pan around.
The "metering start" that the other possible options of the half press of the shutter button can be set to is actually not really true. Metering is started as soon as the camera comes out of sleep.
Just as the text says, when the half press of the shutter button is programed to "AE lock (while button pressed)", the AE is locked when the shutter is half pressed. In my test, the ISO is fixed while I pan around. With the other three possible settings, the ISO continues to change as I pan around while half pressing the shutter button. (Again... no surprised). The surprise to me is that metering is always active unless the camera is sleeping.
