----- Original Message ----- From: "graywolf" Subject: Re: ye olde film v D debate, a bit long
> Come on now, Bill. He just did it for 36 lpm. 40 lpm is an overall system > figure. The arial resolution of the lens is much higher, as is the film > resolution. Folks have explained all this on the list over and over. Still we > keep getting these outbursts of mumble-jumble. Tom gave the formula for any > number of items in the system. > > Overall-res = 1/((1/lens-res) + (1/film-res) + (1/enlarger-lens-res) + > (1/elargeing-paper-res) + (1/viewing-loupe-res)) > Well, then, here is the math for a quality optical system using a good quality colour film: 20. William Robb
