94 Better Available Light Digital Photography
Manual
Then there’s Custom mode, which some users might think is
diffi cult to use, but it’s not. Under tricky lighting conditions, all
you need to do is make an exposure off something that’s white.
The camera will store that image and use it to color-correct your
subsequent images. Although some people look for something
“white” in the scene, there are so many interpretations of white
paint out there that Joe usually brings his own. The fl ip side of
the Kodak Digital Gray Card (www.larkbooks.com) is white and
makes an ideal companion for the photographer interested in
making color-correct images, saving lots of time that would be
spent later tweaking image fi les.
Kodak offers a small (4 × 6) gray/white card, but if you
are looking for something to perform a Manual Color Balance
that is truly pocketable, consider ExpoImaging’s (www.
expodisc.com) ExpoDisc Digital White Balance Filters. Expo-
Disc is a Custom White Balance fi lter that lets digital photogra-
phers improve their color by setting a Custom White Balance
without having to carry, hold, position, or fumble with gray
cards, white cards, or targets. Using your camera’s built-in
Custom White Balance capability, ExpoDisc turns your
camera into an incident color-metering tool. This design
enables the ExpoDisc to receive, scramble, and transmit light
from a wide angle in front of the disc through to the camera’sEach ExpoDisc is manufactured
and individually calibrated by
hand to strict tolerances of light
transmission and color neutrality.
Consisting of multiple layers of
carefully selected and matched
optical-grade materials, each
ExpoDisc is guaranteed for neu-
trality (+/− 2 percent) for demand-
ing photographic professionals.