Koilos

Koilos shutter on a Sirius.
Picture courtesy of eBayer hbpartner. (Image rights)

The Koilos is a German three-leaf shutter. It was the first leaf shutter developed by Gauthier, introduced in 1904. It needed cocking and used a leather break to regulate speeds.

Cameras equipped

The fact that a camera is listed here does not imply that all its versions were equipped with a Koilos shutter:

• Lily Portable Camera
• Nifca-Dox
• Nifcarette
• Sirius
• Super and Special Super
• Murer's Express

Links

In English:

• Shutters - History and Use, an article by Ernest Purdum at largeformatphotography.info with erroneous mentioning of Kenngott as the shutter's maker

In Japanese:

• Unknown plate folder with a Koilos shutter and a Heliostar lens, at the Monomono blog