Taisei Kōki (大成光機) is a Japanese camera maker that was active after World War II.
The three companies Fuji Kōgaku, Katsuma Kōgaku and Taisei Kōki are probably related. All three used the Terionar lens name, and all three have similar logos, showing a cemented doublet lens scheme, with a protuberance on top of the logo, maybe an allusion to the Mount Fuji. In the case of Taisei Kōki, the logo used on the Welmy range is written TAISEI WELMY.
Fuji Kōgaku was split in two parts: Taisei Kōki and Katsuma Kōgaku, with the latter keeping the Lyra brand name. (Fuji Kōgaku and Katsuma both used the brand name Lyra on various cameras.) However there are records of Katsuma Kōgaku dated as early as 1932 (it contributed to found the Tōkyō Kōgaku company, later Topcon), so this cannot be completely accurate.
- According to Tanaka, p. 44, and this page at Japan Family Camera
Source / further reading
- Tanaka Masao (田中政雄). Nihon no niganrefu: Zenpen (日本の二眼レフ：前編, The TLRs of Japan, vol. 1). Tokyo: Asahi Sonorama, 1983. ISBN 4-257-08088-4