Where can I find a description and place to buy these
universal adapters from B+W? This might be a solution
to the problem of the 24 shift not taking external
filters so I am very interested.
Mark Lloyd
--- andrew fildes <afildes@xxxxxxxxxxxxxx> wrote:
> I've been giving this some thought, esp. polarising
> a 21mm - the trick
> seems to be to use a much larger filter as close to
> the lens front as
> possible. For instance, the amazing 12mm rectilinear
> Voigtlander Heliar for
> the Bessa rangefinder uses a uses a step-up ring
> which clamps on to the
> nose of the lens (like many Oly hoods) and a 77mm
> filter. If they can do
> it...
> The simplest is a 49mm step up to a much larger size
> (i.e.62mm) which works
> for a standard thick polariser on the 21/3.5. I'm
> looking at alternatives
> for the 21/4 and 15/4.5 Voigt. lenses I own which
> are much more difficult
> (the 15mm has a built-on tulip - part of the barrel)
> and I notice that B+W
> have a Universal Holder which clamps on to the
> outside of the lens nose
> with three screws and then takes a step-up ring.
> It's made for lenses with
> no filter threads but it should be possible to place
> a filter's glass right
> on the front flange of the lens with this, if the
> lens has enough 'nose.'
> Size 3 is for 37-70mm size lenses. Probably awkward
> to use but if it's all
> there is...
> I'm also considering modifying an old metal or
> rubber hood - cut off the
> clamp ring and glue it to a step-up ring.
> There's always a way. Quality slim polarisers are
> ridiculous prices!
> AndrewF
>
>
>
>
> >Dean wrote:
> >>Hmm. I really want a 24mm that will not vignette
> with a Cokin P
> >>filter - with all but one filter thread cut off,
> and a Polarizer.
> >>Will these work?
> >
> >
> >I stopped using polarizer with the 24. Too much
> vignetting. I guess I
> >should get a slim one, but have to start
> hemorrhaging first (thanks
> >for spell-correction). I use a slim skylight and
> the hood and that
> >cause no problems.
> >
> >Henrik Dahl
> >
> >
>
>
>
>
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