|Foth Derby II|
Unlike more modern cameras, where the shutter is 'cocked' as a consequence of winding on the film, and so appears a seamless operation not noticed by the user, most cameras the age of the Foth Derby require the shutter to be cocked manually (the exception being rotary shutters typically found on box cameras). With leaf shutters, this is done by turning a lever on the side of the lens, a simple operation. On a focal plane shutter, cocking it involves turning a knob to wind the shutter curtains past the film gate, where they travel back at speed with a gap between them to expose the film when the shutter release is pressed.
|Foth Derby shutter unit showing the pin and corresponding holes for selecting different shutter speeds.|
|Middlesex Hospital Chapel, Efke R100, developed in Rodinal 1:25|
|Site of Railway Buildings, Hackney, Efke R100, developed in Rodinal 1:25|