Jonathan C Hall (platinumprint@mediaone.net)
Sun, 16 May 1999 17:20:08 -0400
Did Petzval call this system you speak of as a "Zone System"? I also what
year aproximately you are speaking of.
Curiously Yours,
Jonathan
Steve Shapiro wrote:
> Subject: Re: Thanks again Daryl
>
> > The zone system not invented yet when this book was concieved.. Oh well
> >
> > Jonathan
>
> Gong! Joseph Max Petzval used the system of zones of light and color to
> create a lens that was both all stigmatic, anastigmatic and all chroma,
> apochromatic. Petzval was, then, known in 1860 or so as the father of the
> photographic lens.
>
> S. Shapiro
>
> It wasAnsel who used Petzval's zone system to equate that to the making of
> the negative and the print. Ansel Adams was most interested in that
> application to the computer's use for these values in his and Petzval's
> system when he died.
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