They do them here http://www.srbfilm.co.uk/filters.htm
Page 6 on their downloadable catalogue
----- Original Message -----
From: "Mike Lees" <olympus@xxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxx>
Sent: 30 September 2004 22:19
Subject: [OM] Re: step down rings?
>
> Iwert,
>
> 55-49mm step down ring does exist - I have one made by Hoya.
>
> Mike.
>
> On Thursday 30 September 2004 7:46 pm, you wrote:
> > on 30-09-2004 20:40, Walt Wayman wrote:
> > > Yes, there are such things, but you need to be careful with them. I
have
> > > only one, a 58-55mm that I use on a 150/5.6 Schneider Symmar with my
> > > 6x9/6x7 gear. I would hesitate to use one on a so-called "normal"
focal
> > > length lens, and never on a wide angle. But in the case you cite as
your
> > > intended use, it might not be a problem.
> > >
> > > However, 49-40mm is a pretty big drop, and although it could work, I'm
> > > guessing nobody makes one like that. I suppose you could find two and
> > > screw them together, but why? What's wrong with just using a 49mm
hood?
> > >
> > > I must be missing something.
> > >
> > > Walt
> >
> > Maybe I wasn't clear enough: I'ld like to use a 55-49mm step down ring
> > combined with the 40mm f2 - 100f2.8 85 f2 hood (which is 49mm screw-in)
> >
> > Iwert
> >
> >
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