ABSTRACT
Today there are two different types of shutters used in cameras for still photography. The first is the leaf shutter. This is usually situated within the lens close to the iris diaphragm (the intralens position), though in studio cameras it may be behind the lens. It consists of a number of metal leaves (usually two to five) mounted on pivots on a ring which, when rotated, flicks the leaves rapidly outwards (Figure 8.1) and returns them at the end of the exposure time. On nonautomatic cameras with this type of shutter the series of exposure settings is a geometrical progression of halving: 1 s, then ½, ¼, 1/8, 1/15, 1/30 s, down to 1/500 s (sometimes 1/800 too).
