Hi, > Thanks for the explanation. I do understand the basic concept, although I am > lousy at math. I was being tongue-in-cheek, as I think Bob was.
not entirely! Although I don't suppose anybody's going to change the system just because I think it's confusing. The f-stop system is probably useful to lens designers and so on, but it's just a relic of the Victorian age, that's not useful to people using cameras these days, and probably never has been; in fact it's positively harmful because it's so counter-intuitive - it drives people away from photography. I never understood it when I was learning and just had to accept it. When it had been hard-wired into my brain I made an effort to understand it, but understanding it does nothing to improve your photography, so from that point of view it's not worth knowing. --- Bob
