[rollei_list] Re: An Embarrassing Omission by the List Owner
- From: "Eric Goldstein" <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 7 Nov 2007 10:25:47 -0500
The context of what low contrast means pre and post war is important
to keep in mind...
Prewar, Sonnars were famous for their "bite" with relatively few glass
to air surfaces but by post-war standards we would not view them as
having good contrast. And yes Ed prewar, all fine lens makers apotized
for resolution and not contrast, because contrast sans coatings could
only be taken so far. This is why the Zeiss paper I mentioned in a
previous post was such a turning point not only for that marque but
most others who followed suite... the day contrast became king...
Eric Goldstein
--
On 11/7/07, aghalide@xxxxxxx <aghalide@xxxxxxx> wrote:
>
>
> I think preWWII Zeiss lenses did have low contrast and high resolution. Post
> WWII Zeiss, in my tests showed lower resolution and high contrast. But they
> all make terrific photos, placed in the right hands. It's like the Xenar vs
> the Tessar in the Rollei. Ed Meyers
>
> -------------- Original message from Peter J Nebergall <iusar4s@xxxxxxxx>:
> --------------
>
>
> Staying with that idea, I have two 50mm Sonnar 1.5 lenses for Contax. One
> is a coated Opton, and the other an uncoated prewar piece. The coated one
> has been as good for me as my Summicrons, and of course faster. The
> uncoated one is sharp but very low contrast.... Is this design, or just the
> usual taphonomic considerations of an old lens...?
>
> P.J. Nebergall
>
> On Tue, 06 Nov 2007 16:22:19 +0000 aghalide@xxxxxxx writes:
>
> boy did I mess up. I meant to say that we didn't publish high-contrast
> lenses because we tested for resolution, not contrast. later on the tests
> were also for contrast, as well as resolution. Zeiss Contarex lenses proved
> to be wonderful. Of course the geared down mirror reduced mirror shake which
> also added to the sharpness in this case. Still own the Contarex and three
> lenses of the 1960s. Ed Meyers
>
> -------------- Original message from slobodan dimitrov
> <s.dimitrov@xxxxxxxxxxx>: --------------
>
>
> > ...In memory of the persecuted.
> > S.
> >
> > On Nov 6, 2007, at 6:12 AM, jon.stanton@xxxxxxxxxxx wrote:
> >
> > My Huguenot Ancestors would not be pleased.
> >
> >
> > -------------- Original message ----------------------
> > From: slobodan dimitrov
> > > Interesting!
> > > In my case, having lived in the land of the Franks, I observe St.
> > > Bartholomew's Day Massacre.
> > > S.
> > ---
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---
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