Re: [Leica] Leitz Multiple coating

[Stephen Gandy <Stephen@CameraQuest.com>]

Great find,  I can't help but wonder how many details are generally overlooked
in Leica's smaller brochures or handouts.

For those not familiar with it, the CL and its 40/2 were manufactured from 1971
to 1974.

Stephen Gandy

Bill Barton wrote:

> Hi all, I went back thru my lit. collection and found a very small hand out
> from about 1971/72 from E.Leitz Inc. NJ. They came out with this when Pentax
> was doing alot of advertising about the just introduced "Multi-Coating"
>
> The folder was listed as "How to succeed in Photograpy Without Multiple
> Coating"
>
> "There's a current trend of thought and advertising that claims the multiple
> coating of a camera lens is just about the best thing that's come down the
> pike in recent times. Because Leitz technology takes a different approach to
> the manufacture of precision lenses - one that does not require multiple
> coating. We thought it would be helpful to discuss the two technologies as
> Leitz sees them.
>
> 1.Increased image contrast and color saturation.
> 2.Increased light transmission, and along with that uniform color
> transmission over the entire spectrum.
> 3.Minimizing or elimination of flare,"starlight" reflections, ghosts, and
> UVa light problems.
> 4.Scratch resistance due to unique hardness of the coatings.
>
> All of these features are necessary in a good camera lens. Leitz technology
> starts earlier in the process by creating "zero-defect" lenses with inherent
> properties that maximize light utilization rather than applying external
> remedies after manufacture. In other words, the Leitz approach is to "design
> out" the problem rather than correct it later. Multiple coating of lenses is
> certainly well within the Leitz technology- as yet that haven't chosen to
> build lenses that require this remedy.
>
> Reference:
> Prof. G. Franke: The Development of Modern Photographic Lenses.
> Photo-Technik und Wirtschaft. Jahrgang 22 (1971), Heft 11."
>
> Needless to say I think they got alot of flak about this handout and I do
> not recall seeing anything else about it....
>
> The little handout does not have a date on it or a code number....
>
> wbill