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From: hkr4627@acf4.UUCP (Hedley K. J. Rainnie)
Newsgroups: net.rec.photo
Subject: Re: Camera vibration.
Message-ID: <2720009@acf4.UUCP>
Date: Wed, 13-Mar-85 00:51:00 EST
Article-I.D.: acf4.2720009
Posted: Wed Mar 13 00:51:00 1985
Date-Received: Sat, 16-Mar-85 02:16:30 EST
References: <4957@cbscc.UUCP>
Organization: New York University
Lines: 8

I believe that the OM-2 does not have a lockup, though the OM-1 does.
Lots of cameras lack mirror lockup.  A trick that works with Nikons
(and probably others) without mirror lockup us to use the self-timer.
The mirror locks up at the beginning of the timer interval and when the
timer expires, the shutter fires and the mirror flips down.  If the
timer interval is not sufficiently long to wipe out vibrations from
the mirror flip-up and the timer is mechanical, one may arrest the
motion of the timer for an arbitrary length of time then release it.