It's not just the camera mechanism. The whole setup of 'scope, mount,
camera attachment, camera, etc has certain resonant frequencies at which
it easily vibrates naturally and others which hardly affect it at all. A
camera mirror/shutter mechanism that creates a great deal of vibration
at a 'dead' frequency can have less effect on sharness than a camera
which creates much less total vibratory energy, but does so at a
resonant frequency. Direction of vibration makes a difference too. The
horizontal shutter in all OMs except the OM2000 differ from the vertical
shutter mechanisms in most recent cameras.
Other factors like wind, equatorial drive motor, vibration from the
earth, etc. could create ongoing vibration with one camera body and not
on with another.
Moose
Gareth.J.Martin wrote:
Hello Bill,
I bought my OM-1n with the sole purpose of
Astrophotography too, but now I do much more landscape photography and
stick with visual telescopic observing. When I get my observatory I
think I'll do a bit more astrophotography though. Anyway.... I found
when the mirror was not locked up you do get a beefy but satisfying
clash when you fire the shutter. I've never noticed much vibration but
I have heard reports from my friends with OM-1n's that they are
troubled with some vibration of their scopes. Most attribute it to
their mounts not being of sufficient strength and size for my
telescope. This could be one of your problems (not knowing what scope
you have). There could also be a problem with the virbational damping
of your scope and it may be wise to invest in some vibration
suppression pads to rest your scope on. However I dare say that newer
cameras have much smoother shutter actions, probably as they are
electric (which is a bad, bad thing for astrophotography as I dare say
you well know!). If you want I would try to beef up your mount and add
some vibration supression pads (Celestron used to do a good line in
these pads, but I'm not exactly sure they still do) and this might do
the trick, as well as making visual observing a much better experience
than it already is! Hope this tome of mine helps!
Hey all,
I have been using my om1n for many years for astrophotography. On the
weekend though I tried something. Without the mirror lock, I do get
some
vibration problems. However, with my N*kon F80, which has no such
wonderful
feature, there was no problem. Are today's "modern" shutters just
that much
better for eliminating vibration? Nobody offers MLU anymore.
-Bill
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|