That's the key feature of the design - there is no _real_ optical viewfinder because there is no mirror & pentaprism, which would be needed to redirect the inco

That's the key feature of the design - there is no _real_ optical viewfinder because there is no mirror & pentaprism, which would be needed to redirect the incoming light from the sensor to a viewfinder. Some mirrorless cameras have viewfinders, but it's either a digital display of what the sensor sees, or an actual optical path that doesn't go through the lens system. In either case it's not actual light redirected from the lens. A few illustrations: - https://static.wixstatic.com/media/d28f27_00f04a01eccc4831b9ba1c4fe90cb8bf~mv2.jpg https://static.wixstatic.com/media/d28f27_00f04a01eccc4831b9... - https://images.squarespace-cdn.com/content/v1/5c17fb063917ee776476b05a/1573875320655-04YGZQAMDE4DD333TT5Z/MirrorlessVSDSLR-Image1.jpg?format=2500w https://images.squarespace-cdn.com/content/v1/5c17fb063917ee...