Nikon fe - Manual (Page 21)

FOCUSING—continued
Infrared Photography
The plane of sharpest focus for infrared light is slightly
further away than Its counterpart for visible light as seen
through the camera’s viewfinder. To compensate for this,
first focus the image sharply through the viewfinder.
Then, turn the focusing ring counterclockwise until the
point focused is aligned with the red dot (or line) pro­
vided on the lens barrel. For example, in the picture
below, the lens has been focused for infinity (°°) infrared
shooting. Note that when lenses with a focal length of
50mm or less are used stopped-down to f/8 or below,
compensation is not necessary due to the large depth of
field available.
There are some NIkkor lenses that do not require refocus­
ing for infrared photography; refer to their instruction
manuals for details.
Film-Plane Indicator
To ensure the best results in critical picture-taking
situations, such as closeup or copy photography, it might
be necessary to determine the exact subject-to-film-
plane distance. The Nikon FE Is thus provided with a
film plane indicator (-©-); this is positioned exactly on
the film plane, which Is 46.5mm from the front surface
of the lens mounting flange.
(bayonet mount front surface)
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