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The Kerio is a Japanese leaf shutter, giving T, B, 25–150 speeds. It is listed as made by Miyoshi in the "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras") compiled in April 1943.[1] It is not known if it was an original Miyoshi product or if it was made by Proud before this company was absorbed by Miyoshi.

Cameras equipped

This list is perhaps incomplete. The fact that a camera appears in this list does not mean that all the variants were equipped.


  1. "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras"), shutter item 18-V-2.