So I'm not the only one who goes to art galleries featuring phosphorescent
paintings on velvet lighted by UV? ;^)
I think you did a great job with the scientific experimentation. Someone just
needs to associate something with the data. My best guess is a UV reflective
spray to protect the paintings. Maybe someone knows whether C*non or M*nolta
has a sensitivity to some nearly invisible light?
-jeff
-------------- Original message from Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>:
--------------
>
>
> Jeff Keller wrote:
>
> > Since the gray card was okay: 1.) it would seem the camera is working
> > as expected (no auto change of exposure due to flash etc), 2.)
> > nothing odd about the light source. If the glass were doing something
> > to the light, changing the viewing angle should have a dramatic
> > affect.
> >
> > Could there be something unique about the painting itself? - more
> > light than expected from the painting or the glass. Some polarizers
> > block UV? Canon doesn't see UV?
>
> -----------------------------------------
>
> There were about a dozen paintings to be photographed. After seeing the
> effect on the first three I didn't bother checking any more.
>
> Chuck Norcutt
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