Archived posting to the Leica Users Group, 2002/03/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Reciprocity is usually considered an artifact of long exposures. But Edgerton ( sp?) found that at short exposures, film behaved similarly. If you check some films you will notice exposure ranges that are specified for up to such as fraction of a second. This fraction may be 1/50,000, but it has a limit before reciprocity kicks in. If the Leica repeated flash time is as fast as Lucien has indicated, whereby it looks like 1 constant flash time, then my concern is that the flash duration of a single pulse may be so fast that some film(s) may lose film speed.... Has anyone seen comment by Leica on this subject? Note... Edgerton is the guy that used flash for photography for the first time in the 40's..... at MIT, and estblished the US company called EG+G. He is the undisputed father of flash photography. Frank Filippone red735i@earthlink.net - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html