C. film plane indicator, D. infrared photography – Nikon EM User Manual

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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 0 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
infrared photography focusing index ® for shoot
ing with black-and-white infrared film. The image

is first focused through the viewfinder; then the
lens focusing ring ® is turned until the point

focused is aligned with the infrared index.