B&L Iris Diaphragm Shutter
Bausch & Lomb Iris Diaphragm shutter with Bausch & Lomb lens image by Luis Cozeto (Image rights) |
The Iris Diaphragm Shutter of 1891 was an early sample of Bausch & Lombs characteristic series of two-piston multi-speed brass shutters with diaphragm for standard camera lenses.