define "real film speed". Herb.... ----- Original Message ----- From: "William Robb" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, March 10, 2003 18:41 Subject: Re: wrong iso choosen
> When I was lab testing films while learning the zone system, I found that an > N+2 process (thats a two stop "push") gave about a 1/3 stop increase in real > film speed. > > William Robb
