ExpoImaging ExpoDisc Reference Manual for Digital Cameras - Manual

expo disc
Professional Digital White Balance
Forward
Thank you for purchasing an ExpoDisc.
The ExpoDisc was originally designed by my late grandfather George A. Wallace as an
incident exposure and printing tool for use with 35mm SLR film cameras. But the
advent of the digital imaging revolution created an entirely new application for the
ExpoDisc by enabling photographers to quickly and easily manage their color at capture.
By now you already know that today’s Digital SLR cameras frequently do not reproduce
accurate color when presented with difficult real world lighting challenges. While many
cameras perform admirably in white light conditions, less ideal conditions, (e.g.,
tungsten, fluorescent, shade or stadium lighting) frequently require additional efforts be
taken to consistently deliver accurate color.
Factory defined white balance camera presets simply do not account for the multitude of
real life lighting variables found in almost every scene. And Auto White Balance is too
limited and inconsistent for most professional photographic applications.
Knowing the limitations of reflective metering, digital camera manufacturers allow for
photographers to measure, and correct for the color of incident light illuminating their
subjects through the custom white balance procedure.
A photographer using an ExpoDisc to set a custom white balance can quickly and easily
measure the color of incident light, and, in the process, provide his camera with the
information it needs to consistently capture and reproduce beautiful, accurate color.
From macro to telephoto to panoramic shooting applications, in studio, under tungsten,
in open shade and in mixed light environments, the ExpoDisc is simply the quickest and
easiest way to set a custom white balance.
We welcome you to visit our website at www.expoimaging.net for more information on
the ExpoDisc as well as other ExpoImaging products. There you will find updates on
cameras, additional instructions and helpful tips from the pros, not to mention a bit of
very colorful history on my grandfather George Wallace.
We hope you enjoy your ExpoDisc experience and welcome your feedback.
Sincerely,
Erik Sowder
President
ExpoImaging, Inc.