Seikosha (shutter)

The Seikosha is a Japanese leaf shutter in #0 size. It was developed in 1932 by the Japanese Seikosha company, inspired by the German Compur. It is sometimes called "Seikosha S", apparently because it is equipped with a self-timer and by analogy with the Compur-S.

Variants and cameras equipped (incomplete list, and not all variants are concerned):

• T, B, 1, 2, 5, 10, 25, 50, 100, 250
  • Lord (Tōkyō Kōgaku) by Tōkyō Kōgaku (some sources call it "Seikosha S")

Bibliography

• Kamera no mekanizumu sono I: "Hai! Chīzu" Shunkan o torae-tsuzukeru shattā-ten (カメラのメカニズム・そのⅠ・「ハイ！チーズ」瞬間をとらえ続けるシャッター展, Camera mechanism, part 1 "Cheese!" Exhibition of instant taking shutters). Tokyo: JCII Camera Museum, 2002. (Exhibition catalogue, no ISBN number)