Pentax Program Plus Program Plus Manual - Page 58
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LA r r qui il of.' • O m O3 to ', i I iii I II I le 8 4 a II I 1 l8 IRK 2• LI ' -IF AJ22 ,11 8 5i 4 ? li „ I I"- mom a$: - 1. , L1A, 1 -rr _ !,: I m co to 15 % ir e.- i o i I i I IT i i in 2 1.1 i . 16 84 t8 WE ' A122 b11 8 5.5 4 ?A N ' -T. INFRARED INDEX MARK If you intend to take infrared photographs using infrared film and R2 or 02 filters, it is necessary to compensate for the difference between visible light focus and infrared focus. As shown on the left, note the subject-to-camera distance on the lens distance scale as you focus through the viewfinder and turn the focusing ring until that distance setting aligns with the red infrared index mark. The figure shows an example in which the subject-to-camera distance is set at infinity ( As for exposure control required in infrared photography, refer to the instructions contained in the film package. • 54