11-15-2012 03:11 AM - edited 11-15-2012 03:11 AM
Canon tells me that 5D and 600ex won´t work in radio mode if I don´t use 1/100 sec or longer.
The 7D shouldn´t work either, but does work with High speed sync. My question is if 5D works with High speed sync in real life.
11-16-2012 04:30 PM - edited 11-16-2012 04:31 PM
The full use of radio mode (groups) can only be taken advantage of with the newest canon models 5 D III and 1 Dx
NEW – GROUP mode – "Gr" appears as flash mode on Master Unit
This is one of the premier feautres of the Canon radio-based Wireless E-TTL system.
It requires an EOS 5D Mark III or EOS-1D X (as of March 2012) camera body to perform;
for technical reasons, it's unfortunately not possible with previous EOS SLRs.