Here is a perfect example of when to use some fill flash. This image was created around 30 mins before sunrise on Saturday. A challenging image at 800mm and only at 1/15 sec shutter speed.
I have to thank my model for the cooperation!

Canon 1D MKIV, Canon 800mm L @ f/8, 1/15sec, ISO 640, 600EX-RT flash with Better Beamer and all in Manual mode.
Thanks!




