Archived posting to the Leica Users Group, 1998/09/01

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Subject: Re: [Leica] [Fwd: Pradovit]
From: Alan Ball <AlanBall@csi.com>
Date: Wed, 02 Sep 1998 08:41:08 +0200

Nathan,

Thanks for that post. I think I can complete Pieter's post on at least 1
point: the Zeiss-Ikon lens he refers to is the Zeiss-Ikon  T* Sonnar
90mm f2.5, considered at the time (around 10 year ago) as the best
flatfield projection lens on the market (note the T* coating and the
Sonnar name from Carl Zeiss fame). It was sold through the Braun Paximat
catalogue. I personnaly use that very lens on my Pradovit 600 with very
good results, though it seems just a little too thin for the thread. It
is a beautiful, metal barreled lens.

To go back to one of your other mails: you state you use the Colorplan
CF for plastic mounted slides and that you get center-to-corner
sharpness. I use the Super-Paxon 85mm f2.5 CF, but it does not really
help me with those glassless mounts. The Pradovit 600 still provokes
slide "popping" (after around 5 seconds on a room temperature slide) and
neither the flatfield nor the curved field lenses I have respond
properly to that.

So, before investing into a Colorplan CF, I would like you to confirm
the following points: do your plastic mounted slides "pop" when
projected through your Pradovit 600 ? Does your CF lens manage sharpness
on the whole field AFTER the "pop" occurs or before it occurs ?

Thanks beforehand for your answer

Friendly regards
Alan
Brussels-Belgium

Nathan Wajsman wrote:

> Below is a message I received from Pieter Krigee at Foto Nivo-Schweitzer in
> Amsterdam, explaining some of the differences between the Pradovit 150 and 600
> and giving some of their origins. I thought it would be of interest to the
> list.

> > The P600 was also a Zeiss Ikon projector, but of a much higher quality. The
> > projector was maybe better than the original Leica projector. Leica was/is
> > world famous because of the quality of the Colorplan lens. I think 4 years
> > ago they also came on the market with a Super-Colorplan. This was a lens
> > that had to compete with a Zeiss Ikon 90mm Super Talon (I think the name
> > was).
> > There is an expresion that goes as if you can't beat your enemy, join them
> > (or buy them). So that is what they did.
> > So the P150 is politic and profit!