Archived posting to the Leica Users Group, 2001/04/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]>... I believe their leaf-shutter designs were > consistent > to more than 99% (meaning that an indicated 1/500" would actually be > between 1/495" and 1/505") by 1963. Several Japanese firms were > working in > the same area of research then or shortly afterward. A mechanical > leaf-shutter design will have, as Austin indicates, some problems with > accuracy, though less than the error in a focal-plane shutter. But either > an electronically-assisted shutter or a pure electronic shutter will be > immensely accurate. How did they adjust for the difference in actual speed between fully open to fully stopped down? I can't dispute that one can make a VERY accurate leaf shutter at one aperture, but it's the difference in speed between fully open and full closed that is the issue...not the accuracy at one particular aperture. BTW, this issue of shutter open/close time is the main reason leaf shutters don't go above 1/500 typically, and very few (I only know of the Rollei PQS lenses with the linear motors, are there any others?) go to 1/1000.