INFRARED PHOTOGRAPHY
The infrared index mark is an index to cor
rect the focusing point when you use in-
frared film and red filters. Since infrared light rays have a longer wave-length than
visible light rays, after focusing normally
on the subject, you have to adjust focus by
Isetting that distance against the infrared
index mark.
Taking Infrared Photographs
1. Attach the red filter, and focus on the subject.
2. Shift that distance to the infrared index mark. According to the instructions enclosed with the film, set the f-stop and release the shutter. (Figs. 43 & 44)
* Infrared light rays are invisible to the eye and the light meter, so please refer to the instructions with the film for setting the f-stop numbers.