Archived posting to the Leica Users Group, 2000/07/25

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Subject: RE: [Leica] Leica or B+W Filters
From: "Bergman, Mark A." <mabergm@nppd.com>
Date: Tue, 25 Jul 2000 14:18:47 -0500

No burden to me at all.  I see no difference in my slides.  Can you see the
2% decrease in light transmission that B+W are claiming for non-coated
filters?

I have B+W filters.  I also have Leitz, Waltz, Tiffen, Hoya, etc.  As far as
pictures results I see no difference.  I do see differences in ease of use.

- -----Original Message-----
From: Bob Walkden [mailto:bobwalkden@hotmail.com]
Sent: Tuesday, July 25, 2000 1:36 PM
To: leica-users@mejac.palo-alto.ca.us
Subject: RE: [Leica] Leica or B+W Filters


Hi,

>multi-coating, is a fairly new development.  IMHO I think it is mostly
>marketing hype.

well, B+W at least have published figures. The burden is on you to show that

they are wrong.

Cheers,

Bob


>From: "Bergman, Mark A." <mabergm@nppd.com>
>
>My understanding of multicoalting is that it improves light transmission
>through multi-layers of glass.  Since filters are usually one piece of 
>glass
>I wouldn't expect any coating to do much of anything.
>
>Having used Leica rangefinders for over 20 years I have used (and 
>collected)
>a huge assortment of filters.  Waltz, Hoya, Leitz, B&W, etc.  I have never
>noticed a difference using any of them in my slides.  A few years ago
>(filters are a never ending topic) I tried various brands color contrast 
>and
>UV filters on my 50 Summicron with Kodachrome.  Same landscape picture same
>roll.  No difference that I could detect.  Coating filters, and now
>multi-coating, is a fairly new development.  IMHO I think it is mostly
>marketing hype.
>

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