9.34. Live View, silent shooting, and flash

A camera's Live View mode, which allows for a live display of video from the sensor chip straight to the back panel LCD (or to a TV set), can cause complications for flash on certain models. E-TTL flash metering occurs when the shutter is closed and the mirror is down because the evaluative light sensor is located inside the prism assembly. But in Live View mode, the shutter is open and the mirror is up so that the camera's image sensor can be exposed continuously to light.