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Emil Busch's Roia Spiegelreflex-Kamera was a single lens reflex camera for film sheets or film plates. It was available for the formats 9×12cm and 10×15cm as well as as stereo camera for the 6×13cm plate format. The whole set of Busch's renowned lens types was available for it: Glaukar-Anastigmat F:3.1, Omnar-Anastigmat F:4.5 and Bis-Telar F:7. The camera had a focal plane shutter.