Contrast ratio of HP Z27n

Contrast ratio 1007:1 (edge: 590:1)
Monitor model HP Z27n
Submitted 30 May 2017 22:10 CEST, by 46.29.*.*
Camera model Canon PowerShot SX260 HS
Processing remarks


Black
Screen photo
Luminance 0.33 cd/m2
Luminance spread 0.25 cd/m2 (2 standard deviations)
Exposure value –3 stops   (aim for –2 to –3)
Exposure spread 1.14 stops
Area used for calculation 0.363 x 0.363
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 25.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 330 cd/m2
Luminance spread 24 cd/m2 (2 standard deviations)
Exposure value –1.68 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.363 x 0.363
Camera settings Exposure time: 1/403   ISO: 400   F-number: 3.5
Focal length: 25.1 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.56 cd/m2
Luminance spread 0.49 cd/m2 (2 standard deviations)
Exposure value –2.23 stops   (aim for –2 to –3)
Exposure spread 1.35 stops
Area used for calculation 0.363 x 0.363
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 25.1 mm   (35 mm equivalent)
Exposure compensation: 0
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The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.