the invention of linear perspective is generally attributed to
Filippo Brunelleschi Filippo Brunelleschi (Italian: [fiˈlippo brunelˈleski]; 1377 – April 15, 1446) was an Italian designer and a key figure in architecture, recognised to be the first modern engineer, planner and sole construction supervisor.[4] He was one of the founding fathers of the Renaissance. He is generally well known for developing a technique for linear perspective in art and for building the dome of the Florence Cathedral. Heavily dependent on mirrors and geometry, to "reinforce Christian spiritual reality", his formulation of linear perspective governed pictorial depiction of space until the late 19th century.[5][6] It also had the most profound – and quite unanticipated – influence on the rise of modern science.[6] His accomplishments also include other architectural works, sculpture, mathematics, engineering, and ship design. His principal surviving works are to be found in Florence, Italy; however his two original linear perspective panels have been lost.
Twin-lens reflex camera The TLR camera was thus an evolution. Using a reflex mirror to allow viewing from above also enabled the camera to be held much more steadily than if it were to be held in the hand. The same principle of course applied to SLR cameras, but early SLR cameras caused delays and inconvenience through the need to move the mirror out of the focal plane to allow light to pass to the plate behind it. When this process was automated, the movement of the mirror could cause shake in the camera and blur the image. The London Stereoscopic Co's "Carlton" model is claimed to have been the first off-the-shelf TLR camera, dating from 1885.[3]