On 14 Feb 2001, at 23:33, Pål Jensen wrote:
> Len wrote:
>
> > Some may not know it so it may bear repeating. Pentax and Zeiss jointly
> > developed multicoating. Pentax calls theirs SMC and Zeiss calls theirs T*.
>
> I had a discussion about this a couple of years ago with Bob Shell, editor of
>Shutterbug. I said it utter and complete bullshit.
------- Forwarded message follows -------
Date sent: Thu, 18 Nov 1999 10:58:27 -0500
Subject: Re: AW: [CONTAX] Pentax LX & Zeiss lens
From: "Bob Shell" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Send reply to: [EMAIL PROTECTED]
> Bob,
> AFAIK the T and the T* coating are Zeiss inventions. The T* should have
done
> together with Rollei, they called it HFT. Comments are very welcome on
that
> interesting topic.
>
> Regards
> Wolfgang
That's a common misconception. Zeiss pioneered lens coating and marked
many of their single-coated lenses with a red T . Many firms experimented
with multicoating, but had problems getting the layers to adhere to one
another and to be tough enough to withstand cleaning.
Zeiss people will openly tell you that they got the basic multicoating
process from Pentax, even though they modified it to meet their requirements
before calling it T*.
Zeiss people say T* and HFT are identical, Rollei people insist that they
are not.
Bob
------- End of forwarded message -------
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
Fax +61-2-9554-9259
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