Great thanks, that guide is very helpful, I just have one question, or atleast want to confirm if I am reading it correctly....when it says min / max does that mean when the lens is focused at it's close focus vs infinity?
so my 120 CFI with the 32E would be 0.6 stops to ~ f/4.25 (so just meter for f/4.5) and it would be 1.0 stops at infinity making it f/5.6? thanks