• Use a grey card to take
the exposure from the original.
The KODAK Gray (grey) Card is a consistent natural test target
that allows you to eliminate variables in your determination of
proper exposure. Both in-camera and handheld exposure meters provide
exposure information for an "average" scene, one than
contains a balance of dark and light tones equal to a middle gray
(18%). By taking reflected-light meter readings off of a gray
card, rather than a subject of unknown reflectance, more accurate
exposures will result. The gray card is an in valuable aid for
standardizing photographic, digital imaging, and video processes
for optimal rendering of colors and full incident light.