The Stereo Master (ステレオマスター) is a set of accessories sold and perhaps made by the Japanese company Tōkyō Kamera in 1953.
The set consists of a prism attachment, called the B.S. attachment (B.S.アッタチメント), to place in front of the camera lens, and a stereo viewer, called the B.S. viewer (B.S.ビュアー). It was advertised as a new product in the September to November 1953 issues of Asahi Camera. In the picture, the prismatic device attached to a Leica-type camera, which seems to have a special frame showing the field of view for 18×24mm exposures — this frame was perhaps supplied with the attachment. No actual example has yet been observed, and it is unknown if the device can fit other cameras as well.
|From Asahi Camera September to November 1953. (Image rights)|
- ↑ Advertisements in Asahi Camera September 1953, p.200, October 1953, p.228, and November 1953, p.200.