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Two pieces of tech which allow you to accurately measure colour temperature and the CRI (Ra) and R9 values of a LED light source. the unit will also measure Magenta/Green tint with Duv calculations using the Opple light master IV. the second unit used to accurately measure the RGB or L,a,b values of any coloured object that is placed beneath the sensor of the Datacolor ColorReader EZ. This video does an introductory review of both pieces of tech.
My photoblog: www.grahamhoughton.com/