Canon EX AUTO - Page 28

I nfrared Photography
For infrared photography, correction of the distance scale
is necessary because the focal point slightly deViates from
ord inary photography. When using the 50mm standard lens,
focus
first in tl)e ordinary manner, then adjust the distance
scale
to the infrared mark "." (red dotl. For instance, if the
distance scale reads at 10m after focusing,.merely shift the "10"
scale to "." (red dot) position . When using the 35mm wide-angle,
the
95mm or the 125mm telephoto lens, focus first in the
ordinary manner, then shift the focusing ring counterclockwise
2.1
mm (1/16"), 3.5mm (1/S") and 5. 1mm (3/16") r espectively.
• The
correct i on is based on using film with the highest
wave-length sensitivity figure
of SOOm,u, such as Kodak I R
135 film and Wratten S7 filter .
Film Plane Indicator
When the focusing is done by actual measurement, read
the distance from the film plane indicator and interpret
the measured distance on to the distance scale.
Distance Scale
I nfrared Index " . " (red
dot)
I ndicator (orange line)