Someone guessed it could be a "proximity sensor". If the camera
has a touch-screen, that gets turned off when you look through the
viewfinder.
It is similar to cell-phones that turn off the screen when you bring it to
your ear.
Igor
Toine Fri, 20 Sep 2019 13:04:48 -0700 wrote:
The sensor below the eyepiece: Maybe an EVF but why a pentaprism on
the body. Maybe both DSLR and EVF. I have wet myself :)
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