Issues arising from my latest calibration
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I calibrated an RS55 yesterday for a client who runs a colour grading business. He uses a MacPro and DaVinci software and has a 3 month old Flanders Scientific monitor. Prior to booking me had purchased an Eye-One Display Pro and Chromapure in order to try and calibrate the RS55 himself. He could only get so far with the RS55 without the knowledge and experience so he called me. In the meantime he took readings from his Flanders Scientific monitor and it showed a significant lack of red in the greyscale. He thought this was odd because the monitor was supposed to be factory calibrated with a SpectraScan PR-655. So he got another Eye-One Display Pro, thinking that it must be at fault. However, this too showed the same readings resulting in several DEs of error. When I calibrated the RS55 (using my Eye-One Pro/Eye-One Display combo) we compared the two pictures. There was a visible difference. The client couldn’t understand why, if they had both been calibrated to the same standard that they should look different. I took the opportunity to take a greyscale reading from his monitor and low and behold I got the same results as he did. Thinking that there must be something wrong with his monitor he contacted Flanders Scientific. They immediately became defensive, saying that they had calibrated with a PR-655 and that the Eye-One Pro was a piece of you-know-what and that’s why there was at least 4 DEs of error on the readings I had taken. They sent their original calibration file over and it looked fine (with perhaps a slight oversaturation in the colour gamut on the Red, Magenta, Blue axis). When asked why 4 separate meters gave the same readings they then started saying that even if the projector and monitor were calibrated to the same standards there would still be a perceptual difference. Does anyone have any light to shed on all this? I can accept that the PR-655 is a fantastic piece of kit, but really, 4-5 DEs better across the whole greyscale? Why would 4 separate meters give practically the same results? I’m scratching my head.
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