Re: Horizon 202 camera

[Marco Pauck <pauck@xxxxxx>]

Willem-Jan Markerink wrote:
> > There is probably an additional source for this problem. Just take a
> > look at the sample image in the 'Tips' section of
> >
> > http://www.pauck.de/marco/photo/panorama/horizon202/horizon202.html
> >
> > I suspect the shiny inside of the back door for this effect. Some
> > deep-black paint will help in this case as well.
> 
> Light never goes through the emulsion, with exception of Kodak HIE
> infrared (and a few other thin semi-aerials without an anti-halation
> layer).

Your right. New theory below ... ;-)

> > I'll try to verify this theory as soon as I'll get a Horizon that
> > outlives its six month warranty without any problems. Right now,
> > I'm waiting for my third one as the first two had problems with light
> > leaks and transport. From the feedback I got from other users, light
> > leaks at the seals of the lens drum seem to be a *major* problem.
> 
> Are you sure the shutter did not stay open during recocking?

Absolutely.

When you take a detailed look at
http://www.pauck.de/marco/photo/panorama/horizon202/horizon202_banding0.jpg
you'll notice that:

1. The artefact in frame 23/24 includes distorted but sharp images
   of sprocket holes (at the top on the right side of "TMX" and at
   the bottom)!

2. The artefact on the right of frame 25 is similary distorted (its
   left border is strongly curved). It was casted by the sun in
   frame 26!

Also note that the sprocket holes show up as *dark* in this postive.
Therefore, I suppose that the film inside the image area reflects
the light of the point-like light source sun onto the film going onto
the take-up spool (considering that the film is upside-down in the
camera and going from right to left).

Any clues?

	Marco
-- 
Marco Pauck - WMD GmbH Hamburg, Germany - http://www.pauck.de/marco/
e-mail: marco@xxxxxxxx, phone: +49-40-58958-120, fax: +49-40-58958-199
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