Archived posting to the Leica Users Group, 2002/01/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Rick Floyd wrote: > > Rolfe: > > You should have a look at the Canon E-TTL system. Their system allows you > to have full wireless flash capabilities AND do ratioed A:B lighting up to > 1:8 or 8:1 in 1/2 stop increments automatically. Rick, This is news to me if it works. I will certainly check it out. I'm interested to know how the TTL knows how to shut off the flash in unit A before unit B such that the ratio works out as desired. Is that your understanding of what it does? Both the good thing and the bad thing about TTL flash metering is that there is only *one* sensor and it is at the film plane. In some ways, this kind of stuff is easier to do with automatic flashes like the Vivitar 283 since at least there is one sensor for each unit. Rolfe - -- Rolfe Tessem | Lucky Duck Productions, Inc. rolfe@ldp.com | 96 Morton Street (212) 463-0029 | New York, NY 10014 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html