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F-2 Using an Infrared Camera
you to gain several stops. (If you were to shoot outside without
exposure compensation, the results would be significantly overex-
posed.)
Lighting Conditions Suggested Initial Nikon N90s
Exposure Compensation Value
for the DCS 420IR Camera with no filter
Daylight — sunny -1.7 (use a lower value for cloudy conditions)
Tungsten -2.7
Fluorescent -0.7
We recommend that you bracket to try to ensure proper exposure.
If you use filters that block visible light, the Nikon N90s light meter
and autofocus will not work. However, both should work if you use a
#25 Red Filter over the camera lens.
Many publications contain information about IR photography and IR
filters. For example, the “KODAK Photographic Filters Handbook,”
CAT No E 152 8108, includes a variety of data on Kodak filters,
including filters intended for use in IR photography. These filters can
be used with the DCS 420IR. This publication can be ordered by
contacting Silver Pixel Press at 1-800-368-6257.