----- Original Message -----
From: "Moose" <olymoose@xxxxxxxxxxxxxxx>
> >
> That is amazing to me. I can shake, rattle and roll my 90/2 extensively
> and focus doesn't move at all. Perhaps yours needs adjustment.
Have you tried using a tripod and point the lens down? I have seen two 90/2
that focus moving slowly.
> >Even using aperture prefire you are still subject to vibration between
1/4s
> >to 1/30s,
> >
> Agreed.... Unless you control it. I have lots of very sharp macro shots
> made in that shutter speed range. I don't bother with mirror/aperture
> prefire, as I can't see differences, but I do follow Oly's advice about
> how to hold the camera and release the shutter and use a good
> tripod/head combo that works with rather than against me.
>
Agreed, the best way for these speed is to use a good tripod for low
frequency vibration and hand holding the camera to absorb the high frequency
vibration.
> > I will never use shutter speed slower than 1/125s for macro and
> >most of my macro were made with flash.
> >
> Different strokes for different folks. I almost never use flash and
> usually shoot at below 1/125. This is shot on Portra 160NC with a 50/3.5
> at 1/15, f22 on a CF tripod, Bogen 410 head, "wetware" vibration
> damping, no aperture/mirror prefire. It is just the 2000x3000 scan I get
> from the processor, with no adjustment at all
> <http://www.moosemystic.net/Gallery/_4A_0234s.jpg>. It may not be a
> great image and would look better with a bit of sharpening, but I don't
> see the kind of unsharpness that comes from vibration. When I get a
> chance, I'll try to post some better examples.
>
Ok, if there is no wind, a tripod is feasable and I was using a short macro
then slower speed works. For long macro I will avoid slow speeds or I will
use flash. I do have most of my flower close up using available light but
most insect shots were with flash.
C.H.Ling
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