Archived posting to the Leica Users Group, 2000/08/18

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Subject: Vs: Vs: [Leica] M-multicoating, was: Rokkor story
From: "Raimo Korhonen" <raimo.korhonen@pp2.inet.fi>
Date: Fri, 18 Aug 2000 23:00:19 +0200

I do not doubt it - but my Summilux 35 from 1976 does not have multicoating - so what was multicoated in 1957?
The Pentax multicoating has 7 layers and Fuji EBC has 11 layers so there is a difference. And I "believe" that Optical Coating Laboratory Inc. was needed to make multicoating commercially viable and they had some important patents.
All the best!
Raimo
photos at http://personal.inet.fi/private/raimo.korhonen

- -----Alkuperäinen viesti-----
Lähettäjä: Henning J. Wulff <henningw@archiphoto.com>
Vastaanottaja: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Päivä: 18. elokuuta 2000 21:16
Aihe: Re: Vs: [Leica] M-Rokkor story


>At 7:04 PM +0200 8/18/00, Raimo Korhonen wrote:
>>Do you believe in all legends? Multicoating was definitely jointly
>>productionised by Zeiss and Pentax and an unknown American company called
>>Optical Coating Laboratory Inc. - after some years Leitz obtained a
>>licence. The idea itself is about 100 years old.
>>All the best!
>>Raimo
>>photos at http://personal.inet.fi/private/raimo.korhonen
>
>As Erwin wrote, Leica started coating some lenses with up to 3 layers in
>1957. One of the first lenses to have this 'multi' layer coating was the
>35/1.4 Summilux. In the Pentax PR way of thinking, this was not
>'multi-coating' and especially not 'Super Multi-Coating'. Various
>companies, definitely including the American company mentioned and Zeiss
>were working on multi-layer coatings, but just as definitely Leica had
>multi-layer coatings in production before Pentax did.
>
>   *            Henning J. Wulff
>  /|\      Wulff Photography & Design
> /###\   mailto:henningw@archiphoto.com
> |[ ]|     http://www.archiphoto.com

Replies: Reply from "Joe Codispoti" <joecodi@thegrid.net> (Re: Vs: [Leica] M-multicoating)