I have read this information off a popular Photography site ; I am confused because I tought that for a ratio of 3:1 you need to set your main light to say: f/8 and your fill only one full stop down, f 5.6 in this case.
This is what I believe is not true:
"Simple way to set your ratios. Set your camera to the desired F/stop. Let's say F/8 in this example. Set your main light with the meter to that same f/8 setting. Divide your desired ratio (say 3:1) into that F/8 stop. (8 divided by 3 = F/2.6) Set your fill to F/2.6 and take a shot."
But f/2.6 is at least 3) stops difference from f/8, so the ratio would actually be 1 to 9 if I do what the above statement says?