Pentax 645N - Page 76

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INFRARED INDEX
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When infrared film and an "R2" or "O2" filter are
used, the focal point is different from that of ordinary
film exposed in visible light. The autofocus system
cannot compensate for this difference automatical-
ly.
How to focus
1. Focus on a subject as usual.
2. Set the lens to the manual and turn the focus-
ing ring to the left by the distance indicated
on the infrared index.
* In the autofocus mode, the focus cannot compen-
sate for infrared photography.
* To set the proper exposure level for infrared pic-
tures, refer to the instructions accompanying the
film. The Programmed AE Mode does not give a
correct exposure. Use the Metered Manual Mode.