Can I use a high voltage flash (with a trigger voltage over 5V) on the Cactus v5 transceiver that is mounted on the hot-shoe of my Canon 550D? I know that I can mount the trigger on the camera and ...
I am planning on buying a second hand ETTL flash for my Canon 550D. What are things I should pay close attention to when buying a second hand flash? For example: is there a parameter, comparable to ...