Phil M,
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Alan, the reason I suggested having a sensor in the projector body was to pick up the reflected light from the screen and take into account the screen material variation. I think this would work?
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One challenge would be the distance, especially collecting enough light at the dark end of the spectrum for an accurate reading. A spectroradiometer-type instrument would be required and the cost of implementing one inside a projector would likely be prohibitive for most people.
Good news on the Joe Kane projectors! There have been recent substantial price drops.
Members can contact me privately for more details.
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what a cross to bear being an AV perfectionist is
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I find that the beauty we perfectionists achieve and enjoy along the pathway we've chosen provides sufficient encouragement to persist. At least as long as the money holds out.
In my case, it's nice that the fruit of my labors also provides some income.
Best regards and beautiful pictures,
Alan Brown, President
CinemaQuest, Inc.
ISF, THX, SMPTE, CEDIA
"Advancing the art and science of electronic imaging"