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Years ago I used to belong to an organization called ISF.It was more hobby than business,but at that time,I purchased a Philips PM5639 color analyzer and companion test pattern generator.Excellent results for CRT type tube sets,rear projectors and front projection systems.This combo set me back over $7 grand.When I decided to stop the calibrations,I was fortunate to sell it for almost what I paid.I now use a Sencore.Not as accurate as the Philips,but close and the cost was way less.I can use it with a laptop and the adjustments for both ends of the gray scale for 6500K can be dialed in usually within 10min,depending on the controls.You really can't do grayscale by eye.
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