If the exposure for your camera is just a tiny bit off, the skin tone for your shots will be terribly off. You can use an 18% grey card to determine correct exposure, which is useful for setups when you are doing self-portraits or similar projects.
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Digital Cameras How to Set camera exposure by yourself by using an 18% gray card

By getexcellent
Oct 8, 2010 12:06 AM

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