Canon TX - Film Plane Indicator

Distance Scale
Indicates the distance between the focused subject and
the film plane. It is necessary for checking the depth-
of-field, for flash and infrared photographies.
= The correct position of the scale is in the center of
each value. For example, the correct position of a
two-digit value is the center of the two figures.
Infrared Index
For infrared photography, correction of the distance
scale is necessary because the focal point slightly
deviates from ordinary photography. Focus first in the
ordinary manner, then adjust the distance scale to the
infrared mark ‘*’’ (‘R’’ in the case of FL _ lenses)
in red. For instance, if the distance scale reads 10m
after focusing, shift the 10 scale to ‘’*’’. The position
of infrared mark on the TX is based on using film with
the maximum sensitivity at 800nm, such as Kodak 1R
135 film and Wratten 87 filter.
Film Plane Indicator
When
focusing
is
done
by
actual
measurement,
measure
the
distance
from
the
film
plane
indicator
and
set
the
distance
scale
to
the
measured
distance.
When performing close-ups, macrophotography or copy
work, decide the distance of the camera from the
subject with this indicator.
34
Distance Scale
10 1530 ft
5
ee
m
Infrared Index
(red dot)
Index (orange line)