TSK

TSK is a name on some Japanese leaf shutters of the 1950s. All the examples observed have B, 1–200 speeds.

As the Elbow flex and the Princeflex were sometimes fitted with a TSK shutter and were made by Tōyō Seiki Kōgaku, it seems likely that TSK stands for Tōyō Seiki Kōgaku and that the shutters were made by that company; however, nothing is yet clearly known.

Cameras fitted with TSK shutters

Listing of a camera here should not be taken to mean that all examples of the camera were fitted with TSK shutters.

• Cosmoflex (see this page at Japan Family Camera)
• Elbow flex
• Nikkenflex (see this page at Pleasure Classic Lenses)
• Princeflex