Re: Pos vs neg grain

[Herb Chong]

i've seen this documented too. the measurement technique is enough different 
that you can't compare the RMS numbers between positive and negative film.

Herb....
----- Original Message ----- 
From: "Jack Davis" <[EMAIL PROTECTED]>
To: <pentax-discuss@pdml.net>
Sent: Friday, April 08, 2005 12:24 PM
Subject: Pos vs neg grain


I had a lab owner emphatically contend that.."positive
film of the same ISO has finer grain than negative
film". Didn't address b&w.

I've, also, read the RMS charts but, their results
don't appear to be comparable.