Operating Instructions

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between the film plane and the lens mounting flange is exactly 46.5mm.
Infrared focusing index
When you shoot infrared film, note that the plane of sharpest focus is slightly farther away than that in
visible-light photography. As a rule of thumb, you can compensate for this shift in focus by referring to the
infrared compensation index (in the form of either a red dot or a red line) near the focusing index on the lens
barrel. (Some lenses, including the Reflex Nikkor, do not need compensation. )
After focusing the image sharply through the viewfinder check the focused distance and turn the focusing ring to
the left until the red infrared compensation index lines up with the prefocused distance. Be sure to shoot with the
appropriate filter, such as R60, etc. (In this photo, the subject-to-camera distance is set at i. )