Hi, I only have a few polaroid filters. I couple from old cameras, a few
from IMAX 3D movies, and then some plastic ones that came with science ed
kits. When two filters are placed at 90 degree to each other almost all
light is blocked out, but with some the the filters it only works when lets
say filter 1 is first and 2 is second. Reverse the filters and keep the
angles the same and light goes through at all angles. This does not happen
with my camera filters but does happen with the plastic filters I have.
Based on the way I teach (and learned) polaroid filters, the order should
not matter, just that they are perpendicular. Anyone have a clue what is
going on?
Thanks,
Mike Barr
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