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Message: <blockquote data-quote="Rexer John" data-source="post: 155970" data-attributes="member: 12691">If something should be white, anything from white, through grey, to almost black is correct as long as there's no colour hue.The only thing varying is the brightness of the "white".STM is of course absolutely right, but I think his explanation may be confusing to anyone already struggling with the light falling off at the rate of inverse square from the light source.People using flash are usually most aware of the inverse square law but it applies to all light from all sources.If you don't get the science bit, STM's last sentence is the best place to start, then read the rest of his post again.You've probably already got it, but shout up if any of the jargon in his post is going over your head.</blockquote>