Quite right, Warren, but unless you come up with a folded optical path to
increase sensitivity, the laser tests have accomplished nothing that Gary didn't
already do just shooting the resolution target.
Better to isolate the effects of vibration by comparing vibration-free exposure
(open flash with a shutter held open in a dark room) to a full dynamic exposure
(normal shutter operation). As I said, if both are soft, it's the lens. If
only
the normal shutter exposure is soft, it's vibration/resonance.
John Hermanson is right. There are certainly OM body/lens combinations that may
suffer from vibration, but the OM series is remarkably well harmonized. I just
don't believe it is nearly as big a problem as the volume of discussion makes it
out to be.
That said, since I sold the 200/4 I had, I will be happy to take anyone's off
their hands for, say, 25 bucks and spare you the anguish of shutter-induced
vibration disasters! ;-)
Gary Edwards
WKato@xxxxxxx wrote:
> In a message dated 99-05-08 07:05:36 EDT, you write:
>
> >
> > It's not really necessary to attach the laser pointer to the camera or
> > lens,
> > all you really need is a small mirror attached (maybe with double sided
> > tape) then the laser pointer can be aimed at that.
> >
>
> Let me try to expand on this. You never know if the motion you see with the
> laser light occurs before, during or after the exposure. So attach the mirror
> to the body, aim the laser pointer so that it the dot is in the field of view
> of the camera lens and take a photo. This will eliminate any vibrations that
> occur after the shutter closes and the mirror falls back down (an undamped
> motion).
>
> Warren
>
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