c.
Film Plane Indicator
This is mainly used
in
close-
up
photography to
determine the exact subject-to-film plane distance.
It
is
visible when the film winding
lever"
is
pulled
out, and positioned precisely
on
the film
plane-
46.5mm from the front surface of the lens mount-
ing
flange • .
D.
Infrared Photography
Both Nikon Series E and Nikkor lenses have
an
infra-
red
photography focusing index W for shooting with
black-and-white infrared film. The image is first
fo-
cused through the viewfinder; then the lens focusing
ring
fJ)
is turned until the distance
in
front of the
white focusing index is realigned with the
red
infra-
red
index.
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