Lea, The following statement is further explained at: http://photonotes.org/articles/eos-flash/index3.html#wireless "Slave-capable flash units: Speedlites 420EX and 550EX can both act as a slave flash when using wireless E-TTL. The MR-14EX and MT-24EX can also act as slave flashes, with the two flash bulbs on each unit assigned to slave groups A and B." PageUp and you will find a section on ratios. Bob (still in Louisiana) Turner lea <lea@whinydogpress.com> wrote on 19.06.2003, 21:56:58: > After having spent many tries this day to get on the Canon User Group > I've been unsuccessful yet need some help with my Canon EX series > flashes. I'm asking here in the hope someone can help. > > I have the 550EX and the 420EX flashes. The 550 can run as a master and > the 420 as a slave and I've been quite successful in getting this to > work with no trouble. What I want to do is work with ratios and I'm > unclear if I can do ratios with the 550 and the 420 ONLY or if I need a > couple 420s to make it go. > > Anyone familiar with this? > Lea > > > Lea Murphy > Whiny Dog Press www.whinydogpress.com > New images www.whinydogpress.com/new.html > Picture a Week PAW http://www.whinydogpress.com/paw.html
