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From: drraymond@watdaisy.UUCP (Darrell Raymond)
Newsgroups: net.rec.photo
Subject: Re: vibration in slr cameras
Message-ID: <6593@watdaisy.UUCP>
Date: Tue, 5-Jun-84 20:15:41 EDT
Article-I.D.: watdaisy.6593
Posted: Tue Jun  5 20:15:41 1984
Date-Received: Wed, 6-Jun-84 06:53:41 EDT
Organization: U of Waterloo, Ontario
Lines: 12

Remember that the Leica publication will be talking about Leicas,
which are a little different from other cameras.  Leica reflexes have no
shock absorbing pad for the mirror, because they don't need one; the
mirror is stopped in its cycle and then returned to rest.  So while it
is true that Leicas don't suffer mirror 'slap', this may not be true
in general.

Medium apertures have been recommended principally as a trade-off
between the tendency of lenses to be at their poorest when fully
open and  diffraction effects at smaller apertures.  Thanks to computers 
lenses are much more consistent, so that stopping down one or two stops
from full aperture is sufficient.