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Re: [OM] Apple to Orange comparison

Subject: Re: [OM] Apple to Orange comparison
From: Thomas Heide Clausen <omlist@xxxxxxx>
Date: Wed, 23 Jul 2003 16:13:23 +0200
On Wed, 23 Jul 2003 10:22:53 -0300
"John Hudson" <13874@xxxxxxxxxx> wrote:

> Leitz designed a polarizing filter attachment for M cameras. I have
> saw one in Vancouver a year or two ago. An empty filter with a 
> hinged swing out arm screws into the front of the lens. The second
> arm is attached to a filter holder into which is screwed the
> polarizer. One determines the desired polarizing effect by
> revolving the filter and then one swings the filter in front of the
> lens. Sounds clumsy but the device was precision made and effective
> .... and expensive!
> 
> An easier route would be to carry two identical filters. One on the
> lens and one to view through rotating the on lens filter to match
> the position on the view filter..

Actually, in Paris, we have a shop selling exclusively Leica stuff. I
was there a while ago (the only "leicas" I have go by the name
"Minox", btw), and saw this device. Of course, being curious, I asked
to try it out. My observations are that yes, indeed, it was a decent
attempt at making filters useful for rangefinders and yes, as could
be expected, a Leica-device is very very well made.

However I also found, that probably the two-identical-filters
approach is at least as easy to use as the Leica/Leitz accesory. Of
course, my playing around with it (on an M6, if memory serves) for 5
minutes does not warren a comprehensive analysis and opinion, but it
was a little cumbersome to work with still.

--thomas

> 
> jh
> 
> 
> ----- Original Message -----
> From: "Richard F. Man" <richard@xxxxxxxxxxxxxx>
> To: <olympus@xxxxxxxxxxxxxxx>
> Sent: Wednesday, 23 July, 2003 08:04 AM
> Subject: Re: [OM] Apple to Orange comparison
> 
> 
> > At 07:18 AM 7/23/2003 -0300, John Hudson wrote:
> > >The top and the top left part of the sky in img31 is slightly
> > >darker than the rest of the sky. Is this the result of having
> > >used a polarizing
> filter?
> > >If so what was your technique for measuring the degree of
> > >darkening required?
> >
> > No polarizer. This is on the M7 (RF) so I think it would be
> > difficult to use a polarizer even if I want to. I guess either
> > the sky just looked like that, or the lens is doing something
> > funny. The battery cover fell off
> from
> > the M7 during the trip, so almost all the shots with it were done
> > with the Sunny-16 rule, until I very belatedly remember that I
> > can use my OM-4 as a meter too :-)
> >
> >
> > // richard <http://www.imagecraft.com>
> > <http://www.dragonsgate.net/mailman/listinfo>
> >
> >
> > < This message was delivered via the Olympus Mailing List >
> > < For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
> > < Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
> >
> 
> 
> < This message was delivered via the Olympus Mailing List >
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> 
> 


-- 

------------------------------------------------
  Thomas Heide Clausen
  Civilingeniør i Datateknik (cand.polyt)
  M.Sc in Computer Engineering

  E-Mail: T.Clausen@xxxxxxxxxxxx
  WWW:    http://voop.free.fr/
------------------------------------------------

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