In my case I've narrowed it down to the mechanism just behind the mount
on the lens. It has a little wear through the chrome and into the
brass. The slight additional friction, when added to the additional
mechanism of the extension rings seems to affect the action of the
camera. If I turn the camera mount slightly the camera will complete
the cycle.
You seem to have a different problem.
Gregg
Colin Sheehan wrote:
>
>How would a lens affect the mirror lockup?
>
>
> Gregg Iverson wrote:
> >
> > My OM 4T only does that if I have a particular lens and two or more
> > extension tubes on. The culprit is the lens, as it also does that on my
> > OM 1. Have you tried different lenses? Gregg
> >
> > Colin Sheehan wrote:
> > >
> > > I cannot for the life of me get the little beggar to form a pattern in
> > > it's behaviour. When it fires, it
> > > usually keeps going, but it seems that if I let it sit for a good while,
> > > there is a good chance of a lockup the next time I try it.
> > >
> > > I have to set the shutter to the red 1/60th to release the mirror and
> > > fire the shutter, all the while losing the shot, the frame and my
> > > patience.
> >
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> --
> Colin Sheehan
> Cooran, Qld. Australia
> csheehan@xxxxxxxxxxxxxxxx
> So Much to Do & So Little Time -
> http://www.geocities.com/Heartland/Park/9254/
> HMAS Kanimbla Photographic Cruise -
> http://members.xoom.com/ozcut/kanimbla.htm
> Balkan Folk Music - http://www2.spiderweb.com.au/~csheehan
> Woodford Folk Festival; A Photographic Tour -
> http://www.geocities.com/Heartland/Park/9254/woodford.htm
>
> Here's a general question - how do you season wood?
> I use a combination of a worcestershire marinade and a blend of three
> peppers.
>
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