This new spectroradiometer was brought to my attention by William Phelps, video expert and currently working with Meridian on its digital projectors. A spectroradiometer is a sophisticated test tool used to measure and calibrate video displays (we use the Photo Research PR0650 in much of our testing). This SP-100 from Orb is not a product for the average consumer, but something for the calibration specialist, or well-healed video perfectionist, to know about. Not cheap at about $8000, it's nevertheless less expensive than much of its direct competition. According to Phelps, it compared favorably to a $30,000 Minolta device.