Thanks I think the following site explains the method you described.
http://www.kyphoto.com/classics/filterringtool.html
Rich
----- Original Message -----
From: "John Robison" <omrobison@xxxxxxxxx>To: <olympus@xxxxxxxxxxxxxxx>
Sent: Sunday, September 01, 2002 5:26 PM
Subject: Re: [OM] Filter ring repairs?
>
>
> --- Richard Hawkins <rhawkin3@xxxxxxxxxxxxxxx> wrote:
> > I'd appreciate recomendations on straightening the
> > filter ring on a 100mm f2.8 silvernose. It seems it
> > is dented just enough to prevent a filter from
> > threading on to it. yes or no? special tools?
> > procedures? or forget it?
> >
> > Rich
> Check with John at Camtech, I have straightened a
> couple of filter rings useing his method. Lets see if
> I can describe it. Use a short piece of 3/8 wood
> dowell rod, taper and round off one end to match curve
> of filter ring, holding lens in one hand with dowell
> cradled between fingers and across lens, place curved
> end on threads of bent in section. Now use a small
> mallet to lightly tap other end of dowell, the idea is
> to slowly dolley out the bent part of the filter ring
> with a series of small taps on the dowell. This method
> has worked well for me on filter rings that were bent
> but not badly bashed. YMMV Regards John Robison
>
>
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