Archived posting to the Leica Users Group, 2002/01/13
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I thought I'd mention the newer Canon EOS range of cameras which have what they call FP flash which allows the flash to synchronise at all shutter speeds (up to 1/4000th second on my EOS 50E - probably higher on the EOS 1V). It just so happens that in the current edition of EOS Magazine, dated December 2001, there is an article which describes FP flash. Basically, the flash duration is extended to the length of the exposure, e.g. 0.25 milliseconds at 1/4000th second shutter speed. This means, though, that the intensity of the flash is reduced so it's most beneficial for fill-in flash where the subject is not too far from the camera. Perhaps this could be how the M7 would work? Joe Chan Surrey, England > -----Original Message----- > From: owner-leica-users@mejac.palo-alto.ca.us > [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of Mark > Rabiner > Sent: 13 January 2002 00:01 > To: leica-users@mejac.palo-alto.ca.us > Subject: Re: [Leica] NEW M7 MAJOR CROCK-POT CROW PARMESAN > > > Frank Filippone wrote: > > > > Here is the giveaway..... you can not synch an electronic flash > that has a > > duration of 1/10,000 or faster of a second with a moving slit > shutter, where > > the open time passing through any part of the frame is on the order of > > 1/1000 of a second......unless the shutter is electronically > timed with the > > flash in the manner that Mark reports.... .... This shutter is something > > very different than the M6 and previous shutters....or we got > bum info..... > > This could be done with a Copal between the lens shutter.. remember the > > Leica Compur? IN fact that is a darned good idea.. put a BTL > shutter in the > > camera instead of a focal plane shutter.....I like it! > > > > Different batteries? those impossile to find 123 batteries? Stay > > tuned..... > > > > Why PMA? If Leica's chief market is amateurs with $$$ , which > is what we > > all guess, then PMA is just a rather strange place to announce a new > > camera... OTOH, the free advertising is pretty good...... > > > > Frank Filippone > > > It's not syncing in the traditional sense. > > The flash would have a series of pulses which fill the duration the slit > passes in front of the shutter. > The size of the slit WOULD have an effect on exposure. > AS was done in the Olympus om system. > It's simply the only way such a thing could be done. > Perhaps Olympus is making it for them instead of Metz? > > Kind of emulateing the way you work with a flashbulb but without the > initial delay. > > > Mark Rabiner > Portland, Oregon USA > http://www.markrabiner.com > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html