[rollei_list] Re: : changing lens formulas

There may be a similar Schneider document, but the one to which I am
referring was Zeiss... no ifs ands or buts...


Eric Goldstein

--


On 11/5/07, Jerry Laderberg <jerry@xxxxxxxxxxx> wrote:
> I recall the document as being attributed to Schneider, not Zeiss.
>
>
> ----- Original Message -----
> From: "Eric Goldstein" <egoldste@xxxxxxxxx>
> To: <rollei_list@xxxxxxxxxxxxx>
> Sent: Sunday, November 04, 2007 7:50 PM
> Subject: [rollei_list] Re: changing lens formulas
>
>
> > There is a famous Zeiss document which may account for this. It used
> > to be up on the web but I have not found it for many years. It was a
> > paper describing a pivotal decision for Zeiss... if I am remembering
> > correctly, their research into end users revealed that resolution in
> > excess of 40 lp/mm was seldom needed. As lenses could be apotised to
> > favor either resolution or accutance/edge contrast, and it was the
> > later which was the major factor in perceived "sharpness," they were
> > moving in that direction. Just about every other major manufacturer,
> > with the exception of Canon, followed.
> >
> > I used to have the doc as a pdf but have not been able to find it...
> > perhaps Carlos knows of it and it's location...
> >
> >
> > Eric Goldstein
> >
> >
>
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