photos of autorads
mantei at neuro.biol.ethz.ch
Sat Jan 4 08:46:42 EST 1997
In article <01bbf9a7$e1f7f900$d966c180 at geneticslab2>, "John Korte"
<kortej at css.orst.edu> wrote:
> I have been trying to take photos of autorads to scan into a computer, the
> problem is that my photos are consistently blue-green. The autorads are
> backlit from a typical light box, photos are taken directly overhead with a
> 35mm SLR, with a 90mm macro lens. I've been using 200 ASA Kodak "Gold"
> film (but I've also tried various color slide film also) Any idea of what
> filters I could use to curb this?
> John Korte
The fluorescent tubes in the light box are the cause of the problem (also
a problem if you take photos in a room lit by fluorescent lamps). Some
1) A good photo store should be able to sell you a conversion filter that
will dampen the blue-green cast.
2) If you are going to scan the pictures into a computer, I should think
you could eliminate the color problems at that level (with Photoshop or
3) What is there in an autoradiograph that you couldn't see with black
and white film? I usually use Ilford Pan F.
4) Scan in the autoradiograph itself (in black and white or color--see
above) instead of scanning in the photograph of it.
5) Avoid fluorescent lamps entirely by placing the film on a white sheet
of paper on a repro stand and photographing with incident light (from
above) using tungsten lights (photo floods) with film made for this sort
of lighting (again, a good photo store may be necessary).
Dept. of Neurobiology, Swiss Federal Institute of Technology
CH-8093 Zurich, Switzerland
mantei at neuro.biol.ethz.ch Fax: +41-1-633-1046
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