Pentax KM Camera - Manual (Page 13)

from your own experience. Also, packed in with most
types of 35mm film is a data sheet of suggestions for
determining the correct exposure in a variety of situations.
INFRA-RED PHOTOGRAPHY
If you intend to take infra-red photographs, remember to use the infra-red index marked with an orange line on the
depth-of-field guide. First, bring your subject into clear focus. Then determine the lens-to-subject distance from the
distance scale on the lens. Then match your lens-to-subject distance to the infrared index by turning the distance scale
accordingly. For instance, if your subject is in focus at infinity, turn the distance ring and move the infinity (00) mark
to the index.
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MULTIPLE EXPOSURE
For deliberate multiple exposures,
make the first exposure in the
normal way. Then tighten the film
by turning the rewind knob (A),
and keep hold of the rewind knob.
Depress the film rewind release
button (B) and cock the rapid-wind
lever. This cocks the shutter without advancing the film. Finally, release the shutter to
make the second exposure. Then make one blank exposure, before taking the next
picture, to avoid overlapping. Exposure counter registration may not be exact.