First of all, let me introduce myself. I am French, I live in the French Alps close to Grenoble (the 1968 Winter Olympics city), and I have been a photography fan for many years.
Since November 2012, I moved from Olympus 4/3rd DSLR to Canon Full Frame, with an Eos 5D mkIII body and some EF lenses. I shoot mainly wildlife, nature, landscapes and sports, but I intend to dig into portrait and social photography in the coming year.
Two weeks ago, I got a Speedlite 600 EX-RT for my birthday with the ST-E3-RT trigger and an external Battery pack from Godox (Propac PB820).
I spent time to read the instruction manuals and to test this new gear at home. Yesterday, I went playing in the snow with my kids, and it was indeed an ideal case for my first “in real conditions” use. The weather was sunny (so, a lot of light with the white snow), and I wanted to try some fill-in.
Body was set to Av mode, auto ISO, center weighted metering, and equipped with the EF 70-200 f2.8L IS II. Flash was in E-TTL mode, high speed synchronization, and the external battery pack was plugged (Speedlite’s C.Fn 12 set to both inner batteries and external battery pack). I’ve been surprised to notice that when shooting 3 photos in bursts, the flash fired the first shoot, but not the following ones.
I thought that fill-in was indeed allowing burst with flash firing, and that adding an external battery pack would allow faster recycling to ensure even better flash firing at each shoot.
I know that compensating the light due to snow and sunny ambiance requires some power, but I am a bit disappointed here. Is it the settings of my gear, or shall I consider that this case was a bit “extreme” for a first “in real conditions” ? Could you advise me ?
Another question : why, when using a Speedlite with the body in auto ISO, the ISO automatically sets to 400 ?
Thank you all for your help and advices.