Re: Pourquoi?

[William Robb]

----- Original Message ----- 
From: "Joseph Tainter"
Subject: Pourquoi?


So why does the PZ-1p think that the 1/2 stop between f2.0 and 2.8 
is f2.5, while the *ist D thinks that this is f2.4?
New math vs. old math.
William Robb