Light (shutter)

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The Light is a leaf shutter mounted on some Japanese cameras in the 1930s. It was perhaps made by Ōhashi Kōki Seisakusho, a company which is known to have used this trademark and to have mounted Light shutters on its Roll Light Ref camera.

Versions and cameras equipped

List of versions:

• Light B (5–250, T, B)
• Light C (25, 50, 100, T, B)
• F Light (5–150, T, B)

The exact shutter version is not always mentioned by the sources. The versions above were perhaps predated by an original version with no model name.

On the Light B, the shutter plate is inscribed Light at the bottom and Patent Pending at the top, with an MB logo in a circle on the right. The aperture scale is screwed to the bottom. The speeds are engraved on the shutter rim in that order: 5, 10, 25, 50, 100, 250, B, T.

The camera list is incomplete, and not all the versions of these cameras have a Light shutter:

• Venus plate folder (Light)
• Masnette plate folder (Light, 25–100, B, T)
• Semi Dymos (Light and Light B)
• Hansa Semi Rollette (F Light)
• Roll Light Ref (Light B and Light C)

Bibliography

• Asahi Camera (アサヒカメラ) editorial staff. Shōwa 10–40nen kōkoku ni miru kokusan kamera no rekishi (昭和10–40年広告にみる国産カメラの歴史, Japanese camera history as seen in advertisements, 1935–1965). Tokyo: Asahi Shinbunsha, 1994. ISBN 4-02-330312-7.
• Inoue, Mitsuo (井上光朗). "Shashin renzu no yoake. Renzu-ya Funsenki" (写真レンズの夜明け・レンズ屋奮戦記, Dawn of the photographic lens – Fierce war tales between lens shops). Kamera Rebyū: Kurashikku Kamera Senka (カメラレビュー クラシックカメラ専科) / Camera Review: All about Historical Cameras no.14, October 1989. No ISBN number. Rikō kamera no subete (リコーカメラのすべて, special issue on Ricoh). Pp. 128–132.