ST-E3-RT position and REL button problem of 600EX-RT Speedlite
I have two problems with Canon gear that continue to annoy me. Has anyone got a way to solve them. 1. I use the Canon Speedlite 600EX-RT with the ST-E3-RT mounted on my Canon 1DX and now 1DX II cameras a lot. Nearly always using a tripod, I commo...