Doug Herr
Well-known member
.... Prolonged use of the electronic shutter will significantly reduce the life expectancy of the sensor, compared to using the mechanical shutter most of the time and therefore only exposing the sensor to light while actually recording an image...
Mirrorless cameras such as Nikon Z, Canon R and Sony alpha keep the mechanical shutter open for viewing. The sensor is exposed to light continuously except the brief moment when a mechanical shutter closes. The mechanical shutter re-opens as soon as the image is read from the sensor in order to enable viewing.
In the six years I've been using mirrorless cameras this has not been a problem.