Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 (Tek) 9/26/83; site hammer.UUCP
Path: utzoo!watmath!clyde!burl!hou3c!hocda!houxm!houxz!vax135!cornell!uw-beaver!tektronix!orca!hammer!annej
From: annej@hammer.UUCP (Anne Jacko)
Newsgroups: net.rec.photo
Subject: Re: lenses are sharpest at medium aperture
Message-ID: <757@hammer.UUCP>
Date: Fri, 8-Jun-84 15:06:08 EDT
Article-I.D.: hammer.757
Posted: Fri Jun  8 15:06:08 1984
Date-Received: Sun, 10-Jun-84 00:25:12 EDT
References: <697@decwrl.UUCP>, <287@tpvax.fluke.UUCP>, <2633@watcgl.UUCP>
Organization: Tektronix, Wilsonville OR
Lines: 10

I was also taught (in a photography program in college) that there
is an optimum aperature for sharpness, and it is generally not the
smallest aperature.  There is some "formula" for telling what it
is and I don't remember it without looking at my old notes.  I just
remember that for my 35mm camera, 55mm lens, it was f11.  I also
remember that for a 50mm enlarging lens for 35mm negatives the
sharpest aperature was f5.6; again I don't remember how to figure
that.

-- A. Jacko, Tektronix