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Path: utzoo!watmath!watnot!watdcsu!herbie
From: herbie@watdcsu.UUCP (Herb Chong [DCS])
Newsgroups: net.rec.photo
Subject: Re: My first lens(es) [actually apertures and sharpness]
Message-ID: <1461@watdcsu.UUCP>
Date: Sat, 8-Jun-85 14:34:55 EDT
Article-I.D.: watdcsu.1461
Posted: Sat Jun  8 14:34:55 1985
Date-Received: Sun, 9-Jun-85 02:28:17 EDT
References: <1015@ihuxb.UUCP> <1366@watdcsu.UUCP> <929@peora.UUCP> <579@sfmag.UUCP> <624@bbnccv.UUCP>
Reply-To: herbie@watdcsu.UUCP (Herb Chong [DCS])
Organization: U of Waterloo
Lines: 11
Summary: 

In article <624@bbnccv.UUCP> keesan@bbnccv.UUCP (Morris M. Keesan) writes:
>When the lens is stopped all
>the way down, the smaller aperture causes a deterioration in sharpness due to
>refraction effects.
 ^^^^^^^^^^

that's diffraction.

Herb Chong...

I'm user-friendly -- I don't byte, I nybble....