Re: ye olde film v D debate, a bit long

[William Robb]

----- Original Message ----- 
From: "Tom Addison"
Subject: Re: ye olde film v D debate, a bit long



>
> Time for maths!

Figure out what it needs to be for 40 lpmm, which more closely
resembles what the finest lenses really churn out.

William Robb