ExpoImaging ExpoDisc Reference Manual for Digital Cameras - Manual (Page 13)

ExpoDisc Instruction Manual
v. 4.0. 05/06
13
Usually, standing at the subject position and aiming the camera back towards your
intended shooting position will incorporate the multiple mixed light sources
illuminating your subject. The result will be a white balance that represents the average
color temperature of light illuminating the exact location of the camera and ExpoDisc.
Minimizing the effect of selective colorcasts resulting from dominant unbalanced light
requires some artistic choices. Using color balanced lights will minimize the visible
colorcast created by any individual light source. Increasing the distance between the
subject and a light source will diffuse and subsequently reduce the intensity and
influence of a single color temperature light on the subject.
A photographer can also choose to enhance, or minimize a colorcast when shooting in a
mixed light environment by adjusting where the camera is pointed for the custom white
balance capture. If choosing between a warmer and cooler light source, it is
recommended that you set the custom white balance to the cooler light source. This will
result in a slightly warmer image. Balancing to a warmer light source in the presence of
a cooler light source will result in a cooler image.
If the introduction of white flash light (5500K) into a warm ambient light environment
caused a bluish colorcast, then it may be possible to modify the output of the flash unit
to the ambient color temperature light source by using gels on the flash/fill lights. For
example, use an 85 gel over the flash to match incandescent light, or a 30 green to
match fluorescent light.
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system, or transmitted in any form or by any means, electronic, mechanical,
photocopying, recording, or otherwise, without the prior written permission of
ExpoImaging, Inc. The information contained herein is designed only for use with this
ExpoImaging, Inc. product. ExpoImaging, Inc. is not responsible for any use of this
information as applied to other equipment.
ExpoImaging, Inc. shall not be liable to the purchaser of this product or third parties for
damages, losses, costs, or expenses incurred by purchaser or third parties as a result of:
accident, misuse, or abuse of this product or unauthorized modifications, repairs, or
alterations to this product, or failure to strictly comply with ExpoImaging, Inc.
instructions for use.
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ExpoDisc and ExpoImaging are trademarks of ExpoImaging, Inc.
General Notice: Other product names used herein are for identification purposes only
and may be trademarks of their respective owners. ExpoImaging, Inc. disclaims any and
all rights in those marks.