In 1928, Lieuwe Van Albada invented a viewfinder that occupies the same physical space. It consists of a variation of the refractive reverse-Galilean design but focuses a frame line using a superimposed reflective design similar to that of a mirror telescope.

Who invented viewfinder?

Charles Harrison View-master (model G) 1962. A mass consumer device marketed as a toy, the original View-Master came with thin cardboard disks, or reels, containing stereoscopic pairs of small Kodachrome photographs that when viewed through the apparatus created the illusion of three-dimensional scenes.

What do viewfinders do?

The Viewfinder is the eyepiece on a camera that you hold close to your eye, to allow you to see what's being photographed. ... A digital, or electronic, viewfinder is a real time view of what the camera's imaging sensor is seeing.