Infrared focusing index – Nikon Camera F3AF User Manual

Page 74

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

(but not color) 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.

In infrared photography, use of the R60 filter is required. At first,

focus on your subject through the viewfinder by rotating the lens
focusing ring ® without the filter in place. Then look at the lens

and take note of the focused distance. Reset the focusing ring

so that the desired distance is aligned with the red dot. Finally
take pictures with the filter attached.

Note:

Automatic focusing is impossibie in black-and-white infrared

photography.