TECH FOCUS ELECTRONIC VIEWFINDERS
The EVF is only necessary as CSCs lack a mirror (although early EVFs were used with semi-translucent mirrors, they weren’t as precise, often losing up to half a stop of light), meaning that instead of the view from the lens being reflected up to the viewfinder, the sensor can now digitally render a full preview. The benefits of this system are immediately evident, with the preview instantly updating to show any changes in settings as you make them. Having an EVF also lets you review images in bright, sunny conditions where reviewing on an LCD wouldn’t be possible.
Above The lack of a mirror allows the EVF to display a perfect preview of every shot.