Infrared photography
A completely special photographic technique. Thereby films with an extended sensitivity
in the close IR spectrum as well as dark red or black filters are used. Thus the visible light is blocked.
The Woodeffekt and other strange characteristics:
Contrary to normal black-and-white photographs differ these of infrared films or
digitally cameras by some details. Thus the sky becomes in sunny weather correctly jet black,
while all vegetable like sheets receive a white color, the so-called Woodeffekt.
This does not result from the Chlorophyl.