John ( omtech@xxxxxxxxx) writes:
<< And almost ALL leaf shutters are, at best, 1/350th, when set to 1/500th. >>
In testing leaf shutters the test equipment makes a difference as to what
number you get since the travel time of the blades becomes part of the
exposure at 1/500 (a sort of variable aperture during exposure). To measure
the "time" accurately it ideally should intergrate the light and measure
exposure rather . This also means the exposure may vary somewhat as the
aperture is topped down depending on how close the shutter and diaphram are
and the shutter travel time.
Tim Hughes
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