Hi,
Some years ago (1993) I experimented with Kodak's "high speed b/w infrared
film".
I used an OM4 + T20 flash with a complete black filter nr 87 in front of the
T20 flash. With the camera set on ISO 3200 TTL exposure appeared to be fine
(still a little bit too light, but I couldn't find the ISO 6400 setting...)
With the filter taped on the flash, you can take pictures in total darkness
without seeing the flash light. I have taken pictures from people taken
astronomy pictures, with no influence at all on the astropics and without
people having any clue about how I did take the pictures!
Very funny. A sort of 007 style of photography.
Bye,
Erwin Voogt
Utrecht, The Netherlands.
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