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• In fast-breaking situations, or in candid shooting,
you can prefocus the lens by using the distance scale
engraved on top of the lens barrel. Estimate the
distance between you and the subject. Then turn the
focusing ring until this distance (in feet or meters) is
aligned with the focusing index mark. This method is
especially useful when there is not enough time for
through-the-lens focusing, or when you do not want
to draw attention to yourself by lifting the camera
to eye level.
•
Film Plane Indicator – the mark engraved on the
camera just to the left of the pentaprism indicates
the exact position of the film plane. This is an aid
when actually measuring the film-to-subject distance
in macrophotography.
• Black and White Infrared Photography: Because
infrared light rays focus on a plane slightly behind
that of ordinary light rays, it is necessary to modify
slightly the normal method of focusing the lens.
First, focus on the main subject as usual. Next, take
note of the focused distance (in feet or meters)
which appears opposite the focusing index mark.
Then, turn the focusing ring slightly, so that the
focused distance is aligned with the tiny red dot
engraved on the lens barrel just to the right of the
focusing index mark. Use a red filter (R1) over the
lens and set the aperture ring manually hollowing the
film manufacture's suggestion for exposure settings.
• Color Infrared Photography: In color infrared
film, two of the film's layers are sensitive only to
visible light, while the third layer is sensitive only to
infrared. Therefore, it is not necessary to readjust
the focused distance. However, f/stops of f/5.6 – 16
are recommended to produce sharp pictures. Use
either a dark yellow (Y3) or orange (O1) filter and
set the aperture ring manually following the film
data sheet.
Not For Resale – Free Download at http://www.joe-chan.com/manuals
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focused distance
infrared mark