Archived posting to the Leica Users Group, 2003/04/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]so for example, if given a speed of 1/200 that covered 1/4 of the frame at any given time, your HSS flash would emit 4 flashes that illuminated the subject as the shutter uncovered each quarter of the frame? i am certainly no expert, but intuitively, that seems difficult to do without, as you say, gaps or overlaps. the smallest deviation in tolerance would be visible in the frame. i had assumed a flash system capable of short multiple flashes and a high degree of persistence (like a TV tube) so as to approximate a continuous flash. but you learn something new every day, don't you? :-) - -rei On Thu, Apr 17, 2003 at 07:09:20AM -0600, John Collier wrote: > No, HSS flash is not like the M sync on the earlier cameras. HSS > carefully syncs a series of low power flashes with the shutter as the > slit crosses the film plane. It has to be precise as there can be no > gaps (dark bands) or overlap (bright bands) in the multiple flash > exposures. > > John Collier > > On Thursday, April 17, 2003, at 05:11 AM, Rei Shinozuka wrote: > > >it occurred to me upon acquiring an M3, that the idea behind the M sync > >was that it triggers when the first curtain starts to open as opposed > >to X > >sync which is triggered when the first curtain is completely open and > >before > >the second starts to close. this permits the (relatively) long-burning > >flashbulb to provide illumination as the slit is traversing the frame. > > > >isn't that exactly the idea behind the new high-sync electronic > >flashes; to > >provide quasi-continuous output for an interval of 1/50th second, and > >therefore would one be compatible with M-sync machines (like the M3?) > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- Rei Shinozuka shino@panix.com Ridgewood, New Jersey - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html