Nikon FG - Memo Holder; Infrared Focusing Index

As a reminder of film type. ASA/ ISO speed, and the
number
01 exposures on the roll in use, clip off the
end of the
film carto n and insert into the memo holder
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The red dot located just beside the focusing index
on most lenses is the infrared focusing index. When
shooting with black-and-white infrared
film, it is
necessary to refocus the
lens to compensate for the
fact that infrared rays focus at a point
slightly in front
of
vi sible light. To use the index, focus on your subject
through the viewfinder, then
look at the lens and take
note of
th e focused di stance. Finally, reset the focu s-
ing ring so that the desired distance is aligned with
the red
dot.