ExpoImaging ExpoDisc Reference Manual for Digital Cameras - Manual (Page 10)

ExpoDisc Instruction Manual
v. 4.0. 05/06
10
3. When the RGB values at the bottom of the screen are within a point or two of each
other the white balance is nearly perfect. When the numbers are significantly different
the image has a colorcast. Equal numbers mean a perfectly neutral White Balance.
4. If the RGB numbers don’t match, then click on the White Balance Tool (the
eyedropper) and then click on the Gray Frame Reference. This will neutralize the color,
and the RGB values will now be equal. Click OK.
5. Open the next photo in Camera Raw. Instead of “Camera Default” change the setting
to “Previous Conversion”. This will apply the neutral White Balance setting established
by the Gray Frame Reference.
6. Adjust the Exposure and Shadow settings for the photo, and click OK. You can open
the rest of your images taken under the same lighting conditions using “Previous
Conversion” individually, or use the Batch feature to apply these settings to all the
images in the folder.
“Many professional labs will do color correction for you, and they can only give you the
best quality prints from image files that are properly exposed and require little color
correction. Using the ExpoDisc will help ensure both consistency and neutrality.”
-Peg Jackson.
2.c. Using a Custom White Balance to Create Warming and Cooling
Effects
You can modify your ExpoDisc custom white balance by placing a colored filter over the
front of the ExpoDisc during the custom white balance procedure. This will create a
custom color profile that adds a colorcast inverse to the color of the filter placed in front
of the ExpoDisc. For example, using a yellow filter in front of the ExpoDisc will create a
cyan cast to all images to which that custom white balance is applied. Note that the
warming and cooling filters are used only when the custom white balance captures are
made. The actual photo is shot without any colored filters.
In this fashion, the ExpoDisc can be used with Kodak Wratten Series warming and
cooling filters to provide the traditional look of film warming and cooling with digital
capture.
For a warming series, shoot balance captures with the bluish 82, 82A, 82B and 82C
filters. When the custom white balance procedure removes the excess blue of these
captures to normally exposed images, the compliment of the 82 series will be “applied”
to the normally exposed images, thereby resulting in 81, 81A, 81B or 81C warming
effects.
For a cooling effect on your normally exposed images, shoot balance captures with the
warm looking 81, 81A, 81B, and 81C filters. When the custom white balance procedure
removes the excess warming effect of these filters, the compliment of the 81 series will
be applied to the normally exposed images, thereby resulting in an 82, 82A, 82B or 82C
cooling effect.