I’ve always been able to take the picture. I attempt to channel my anger into the tip of my forefinger as I press the shutter. I’ve often said, perhaps tritely, that one can’t focus with tears in one’s eyes. My view is that a photographer who becomes emotional is as useless as a surgeon who faints at the sight of blood.
I may have shed pints of tears over what I’ve seen, but only later, when editing and printing the pictures.