Fascinating. Nice work.
Paul
On Aug 16, 2009, at 7:29 PM, Ralf R. Radermacher wrote:
http://www.fotocommunity.de/pc/pc/display/18201202
The Wratten #87 is an extremely strong IR filter, totally opaque to
the
human eye. It is way beyond the sensitization of the usual near-
infrared
films (Konica IR795, Ilford SFX200). Apparently, the DS' IR
sensitivity
extends to much longer wavelengths (820+ nm).
Enjoy,
Ralf
--
Ralf R. Radermacher - DL9KCG - Köln/Cologne, Germany
Blog : http://the-real-fotoralf.blogspot.com
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Web : http://www.fotoralf.de
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