Years ago (in the days of film!!!) my camera (Minolta 7000i) had a 'setting' when using external flash units.
I now have a Canon 40D and (because it was cheap) the Canon 550EX flash unit which I have never used.
Going to a wedding I want to take 'inside' shots but with the ladies probably wearing 'big hats' outside would also like to try 'fill in'........I'm just a family guest not THE photographer!!
I am trying to understand the instructions but they seem more like computer instructions
Is it possible to give me some simple basic guidelines for best/easiest settings
Thanks