The Osiroflex is a twin-lens reflex camera for 6x6 cm pictures on 120 film, made by the obscure Japanese maker Osiro Optical, which, as OMS Optical, apparently made only one other camera (the Marioflex, also a TLR). McKeown and Sugiyama date the Osiroflex to 1955. An example of the Osiroflex is shown at Barry Toogood's TLR-Cameras.com, with an 80 mm f/3.5 Osiro Optical lens, and an NKS-SC shutter with speeds 1 - 1/200 second, plus 'B', synchronised for flash with a PC socket on the front of the camera. Another example was offered for sale on a Chinese-language forum, with an 80 mm f/3.5 Rozeck lens and a Rektor shutter, with speeds to 1/300 second and with a self-timer. This example has the OMS logo stamped in the film-back opening catch. The camera has its focus and film advance knobs on the right side, and the shutter release is positioned for the left index finger. Film advance appears to be by use of the red window; the last example cited has a sliding cover over the window.
- McKeown, James M. and Joan C. McKeown's Price Guide to Antique and Classic Cameras, 12th Edition, 2005-2006. USA, Centennial Photo Service, 2004. ISBN 0-931838-40-1 (hardcover). ISBN 0-931838-41-X (softcover). p757.
- Sugiyama, Kōichi (杉山浩一); Naoi, Hiroaki (直井浩明); Bullock, John R. The Collector's Guide to Japanese Cameras. 国産カメラ図鑑 (Kokusan kamera zukan). Tokyo: Asahi Sonorama, 1985. ISBN 4-257-03187-5. Item 2208.
- Osiroflex at Barry Toogood's TLR-Cameras.com; brief notes and pictures of an example.
- Forum post offering an Osiroflex, from March 2011, on the Chinese-language Camgle forum; several good close-up pictures of the camera.