This is normal. It is how the lens maintains a constant aperture wide open.
Julian
> from: John Hermanson <omtech@xxxxxxxxx>
> date: Thu, 19 Jun 2003 13:47:15
> to: olympus@xxxxxxxxxxxxxxx
> subject: Re: [OM] Diaphram faulty on 35-7- F4
>
> That condition is normal for many zooms.
>
> Closed 6/28 thru 7/6
> _________________________________
> John Hermanson www.zuiko.com
> Camtech, Olympus Sales & Service since 1977
> 21 South Lane, Huntington NY 11743-4714
> 631-424-2121 For Free Olympus manuals,
> please call 1-800-221-3000
> _________________________________
> ----- Original Message -----
> From: "Tom Murphy" <murphytj@xxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxx>
> Sent: Wednesday, June 18, 2003 1:52 PM
> Subject: [OM] Diaphram faulty on 35-7- F4
>
>
> >
> > Hi all,
> >
> > I have an S Zuiko 35-70 f4 zoom with a diaphram that doesn't seem to be
> > fully opening. The blades are snappy and when I look through the lens,
> > set at f4, with the zoom set at 70mm I see a circular opening. However
> > if I set the zoom to the 35mm setting and look through it the diaphram
> > is shaped like an octagonal. I presume that the aperture blades are not
> > fully open. Is this normal? If not are there any suggestion as to how
> > to rectify it?
> >
> > Tom Murphy
> >
> >
>
>
>
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