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Re: [OM] Olympus OM Series adapters

Subject: Re: [OM] Olympus OM Series adapters
From: "richard mcgrath" <richardinvermont@xxxxxxxxxxx>
Date: Sun, 11 Apr 2010 01:44:04 -0400
Wayne hi,
Delighted to hear the lens is ok. Thanks for the lead.  I sent a query.
Richard
----- Original Message ----- 
From: "Wayne Harridge" <wayneharridge@xxxxxxxxxxxxxxx>
To: "'Olympus Camera Discussion'" <olympus@xxxxxxxxxxxxxxxxx>
Sent: Sunday, April 11, 2010 12:33 AM
Subject: Re: [OM] Olympus OM Series adapters


> G'day Richard,
>
> I suspect the adapter is not helping !
>
> Most adapters will actuate the aperture stop down lever when the lens is
> mounted to the adapter (some don't).
>
> For a start, remove the lens from the adapter and looking at the rear of
the
> lens rotate the aperture ring.
> One of the levers should move as you do this.  Move the aperture ring to
16
> and push the other lever with your finger, the actual diaphragm should
then
> close down fully.  If this happens then there is no problem with the lens
> mechanism.
>
> Many people on this list recommend the adapters sold through the auction
> site by "jinfinance".
>
> ...Wayne
>
> Wayne Harridge
> http://lrh.structuregraphs.com/
>
>
> > -----Original Message-----
> > From: richard mcgrath [mailto:richardinvermont@xxxxxxxxxxx]
> > Sent: Sunday, 11 April 2010 1:38 PM
> > To: olympus@xxxxxxxxxxxxxxxxx
> > Subject: [OM] Olympus OM Series adapters
> >
> > Hello,
> >
> > I purchased on eBay an Olympus Zuiko Auto-S 50mm F1.8 lens (the lens is
> > marked "Made in Japan"), Serial No. 5870379. Although used, the lens
> > appears to be in near-mint condition.
> >
> > I also purchased an adapter to fit this lens onto a new Panasonic DMC
> > GF1 micro 4/3 camera body. I take pictures through a research
> > microscope, through a telescope, and just for fun. In the first 2 of
> > these cases, focus is critical. One of the main reasons for selecting
> > this camera is the live on-screen enlargement capability (which is
> > super) as a focusing aid. The adapter I have works ok as far as
> > coupling the lens to the camera. There is, of course, neither "auto"
> > nor electrical connection.
> >
> > Here's the problem, with the OM lens mounted on the adapter (or just
> > holding the lens in my hand) the iris opens and closes smoothly, but
> > only when holding the rectangular button on the side of the lens.
> > Inside the lens is a spring-loaded articulator that are clearly
> > designed for automatic control of the iris. If I hold this at its
> > limit, it has the same effect as holding the rectangular side button,
> > i.e. the iris opens and closes smoothly as the f-stop is changed. Left
> > to its own devices, the lens stays wide open.
> >
> > Bottom line: I don't know if I have a lens that isn't working the way
> > it should or if there's some function of the lens that I just don't
> > know about or if I have an adapter that doesn't do what it should.
> >
> > It is clear that lots of folks use adapters to connect any number of
> > lenses (including the Olympus OM Series) to any number of cameras. I
> > have fair experience with Pentax, Sigma & Vivitar lenses, with adapters
> > to paste them onto bayonet or screw mount cameras, and with adapters to
> > paste cameras to telescopes and to microscopes, bellows & extension
> > tubes.  With the lenses I'm familiar with, you turn the diaphragm ring
> > and the iris opens and closes---end of discussion. But I'm not familiar
> > with this, my first Olympus lens, so a bad lens is a possibility.  Is
> > what I have described in paragraph # 3 above,  the normal operating
> > scheme for the OM Series lenses?
> >
> > I have a problem here and I'm hoping someone can make some helpful
> > suggestions. My problem seems to point to the adapter.  I need a good
> > Olympus OM lens to micro 4/3 mount adapter and I don't think I should
> > have to pay $150 to $250 for it. Can someone suggest a brand of adapter
> > that works the way it should with OM Series lenses.
> >
> > Thanks in advance for your help,
> > Richard
> > --
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>
> -- 
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
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> Themed Olympus Photo Exhibition: http://www.tope.nl/
>


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