on 30/10/01 3:06 pm, Guillermo at pen...@home.com wrote: > >> ----- Original Message ----- >> From: "ragowaring" <ragowar...@btinternet.com> > >>> Anyway, enough of an introduction; could anyone please tell me how to >>> calculate the natural progression of f stops doubling exposure from one >>> number to the next, or post a list of these. > > They follow a geometric progression that make the f/stops increase by a > factor of square root of 2 > > Need a more complete explanation? let me know. > > Guillermo > > > > > _______________________________________________ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/
Wow!, is it really that simple. Of course, it all makes sense now and it will be very helpful. Thankyou for your replies. If it is not too much trouble a complete explanation would be very welcome Guillermo. Thankyou also to Murray for how you calculate the exposure for a given camera; this method will help me relate one camera to another; also thanks to Bill Erikson. I too don't know what happened to Philip Arny but he has sent me masses of empty messages. I guess if the cat continues on the keyboard this way it may come up with one of Shakespear's plays orthe meaning of life, universe, everything. Alexis
