Two-room camera
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A two-room camera is a camera for large-format films that is divided into two rooms (light and dark room). It is used to create enlarged / reduced copies, films or slides from the flat template ( maps , paintings, films, etc.) in the reproduction .
The two-room camera consists of a camera tripod with a guide rail in the light room, on which the individual components (lenses, template holder, camera bellows) are firmly mounted. The original to be reproduced is placed on the original holder. The lighting units (e.g. xenon lamps ) optimally illuminate the original (transmitted light / incident light).
In the neighboring dark room you can now use a control panel to make all the necessary settings for a sharp picture. Then the pivoting film holder is provided with a film. These large-format films are sucked into the film holder by vacuum and pivoted into the optical axis of the camera for exposure. The films are developed in large tubs or in large draw-through developing machines , in which the film to be developed runs through 3 baths one after the other (developer, fixer, water) and is then dried with warm air.