by ʇolɐǝz ǝɥʇ qoq

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The image forming lens flips the image once. For the imaging sensor, there is one flip. The viewfinder is made up of a fold mirror, the one in the mirrorbox of the camera, a focusing screen, and either a pentaprism or two mirrors. The fold mirror flips the image once, restoring it to "normal" parity. This means there are two inversions in a waist-level ...


The image forming rays from the camera’s lens are intercepted by a hinged first surface (reflex) mirror set at a 45⁰ angle. This first reflection rights the upside down image, but, being a mirror image, it is reversed right for left. This image is projected onto a viewing screen. The bottom side of this screen has been roughened by scrubbing it with fine ...

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