Nikon FG-20 - Film Plane Indicator; Infrared Focusing Index

-CONTROLS IN DETAIL-contlnued ----------
Film Plane Indicator @
The film plane indicator (~) is engraved on the top
deck just behind the ASAIISO film speed ring
@ . It
indicates the exact position of the film inside the
camera and
is used to measure the exact distance
between the subject and film plane, such
as in macro-
photography. The distance between the film plane
and lens mounting flange
@ is exactly 46.5 mm.
30
Infrared Focusing Index @
When you use black-and-white infrared film, the plane
of sharpest focus
is slightly farther away than that in
visible-light photography. To compensate for this shift
in focus, most lenses have an infrared focusing index
(a red dot or line) beside the distance index as a rule
of thumb.
After focusing
in the normal way, look at the lens and
take note of the focused distance; then reset the
focusing ring
so that" the desired distance is aligned
with the infrared focusing index. Finally, attach the
necessary red filter (R60) and take the shot .
• 'n black-and' white infrared photography, the camera's built-
in expcsure meter will not give an accurate reading, so use
the recommended settings supplied by the film manufacturer
and, as insurance, bracket your shots.