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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.
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