The Rectus is a leaf shutter found on some Japanese cameras from the 1950s. There are at least two variants, with B, 1–200 and B, 1–300 speeds. It was made by Fuji Seimitsu, which also made the Ceres leaf shutter. It seems that it was a copy of the Prontor II.
Cameras equipped with a Rectus shutter
|Rectus on a Prince Junior|
image by Hans Kerensky (Image rights)
The following list is incomplete. That a particular model is listed should not be taken to mean that all examples were fitted with the Rectus.
- Condor (35mm) (Rectus-MX, B, 1–500)
- Elbowflex (B, 1–300 reported)
- First Six I (B, 1–200, one isolated example)
- Fujica Six IICR
- Mamiya Six K (one isolated example observed, perhaps not original)
- Mine Six and Mine Six IIF (B, 1–200)
- Neoca 2S
- Prince Junior (B, 1–300 reported)
- Attribution of the Rectus to Fuji Seimitsu: a leaflet advertising the Mine Six IIF; also this page (archived) at Japan Family Camera.
- See this post (archived) in the Classic Camera Repair Forum. Takane claims that it is "Prontor type" (プロンタータイプ) in a leaflet advertising the Mine Six IIF.
- Image in Camera-Wiki Pool
- 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.
- Takane Kōgaku. Leaflet advertising the Mine Six IIF.