[LargeFormat] Any info on the Industar-37?

[Marco Pauck]

Robert Mayrand wrote:
> 
> Hi Marco,
> 
> There is a little bit of info but not much on the german site
> http://www.baierfoto.de/russobj/objektive.html (Marco should'nt have any
> problem but for those of you not speaking german you can translate it via
> alta vista babel translater).

This is a nice page as it contains brief descriptions of many
Russian lenses. I sent Dr. Donau a mail asking him for the source
of this data.

> According to his diagram it seem that it is indeed only 3 single lens
> element, normal objective for 18X24cm, 53°, Resolution (center/edge) 20
> lin/mm / 5 lin/mm  (wich seem incredibely low to me!!!)

The diagram is not very clear and also generic for many of the
Industar lenses, but I think that it depicts a 3 element design
with *four* lenses (the last element seems to be an achromat).
This matches well with my actual lens as the rear element is
quite thick and heavy. (Well, the whole lens is HEAVY!)

The resolution numbers don't look impressive but I won't give too
much on them as long as it's unclear on with contrast and f-stop
they're based. And remember, large format negatives don't have to
be enlarged to the same degree as 35 mm negs (if at all).
Haven't shot anything yet but on the ground glass the image look
promising ...

	Marco

>  On 1/27/02 10:39 AM, "Marco Pauck" <marco@pauck.de> wrote:
> 
> > As an addendum to my last message regarding the FK:
> >
> > The FK 18x24's standard lens is an Industar-37 4,5/30 cm.
> > I've disassembled it to fix the sticky diaphragm and remove
> > the ugly paint revealing a really nice brass finish:
> >
> > http://www.pauck.de/marco/photo/stuff/fk/lens.jpg
> >
> > I noticed that the optical design consists of three elements,
> > but I'm not sure how many actual lenses. From the reflections
> > by the lens' coating, I would guess that the elements are
> > single lenses (not achromats).
> >
> > The Industar-37 is included in Kadlubek's lens catalog (RUS0760)
> > but without any details. Princelle's book has no further info
> > at all.
> >
> > Does anyone have more information?
> > Is the lens design a copy of a western design?
> > Any hints about performance and coverage?
> >
> > Marco
> > --
> > Marco Pauck -- marco@pauck.de -- http://www.pauck.de/marco/
> > For every complex problem, there is a solution that is simple,
> > neat, and wrong.  -- H. L. Mencken