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December 2006 Graphic Arts SIG:

Exposure and Lighting for Digital Cameras, Part II

By Hal Cauthen

Michael Glagola was back at the December 2006 meeting of the GASIG, continuing his series on Digital Photography. The topic for this meeting was: “Exposure and Lighting for Digital Cameras Part II.”

In this session Michael pointed out the problems that can occur when using Auto White Balance. He showed by the use of examples with different color backgrounds and different light sources that Auto White Balance can be fooled and that the result can be pictures with colors far different than expected. The series of examples with different light sources showed the conditions that can cause difficulties for the white balance capabilities of digital cameras and how to use preset white balance (Tungsten, Daylight, etc) and Manual White Balance. The final part was suggestions on how to achieve the best white balance under difficult conditions.