Infrared focusing index – Nikon F3 User Manual

Page 44

Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".

Text mode
Original mode

Infrared focusing index

The red dot beside the focusing index on most lenses

is the infrared focusing index. When shooting with

black-and-white infrared film, it is necessary to refocus
the lens to compensate for the fact that infrared light rays
focus at a point slightly in front of visible light. To use the
index, first focus on your subject through the viewfinder.

Then look at the lens and take note of the focused dis

tance. Finally reset the focusing ring so that the desired

distance is aligned with the red dot.