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Contrast ratio of HP Z24i

Contrast ratio 825:1 (edge: 877:1)
Monitor model HP Z24i
Submitted 26 May 2025 00:04 CEST, by 146.70.*.*
Camera model Canon PowerShot G7 X Mark II
Processing remarks


Black
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –2 stops   (aim for –2 to –3)
Exposure spread 1.03 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 2   ISO: 400   F-number: 2.8
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 173 cd/m2
Luminance spread 17 cd/m2 (2 standard deviations)
Exposure value –1.96 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.8
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.15 cd/m2 (2 standard deviations)
Exposure value –2.08 stops   (aim for –2 to –3)
Exposure spread 1.18 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 2   ISO: 400   F-number: 2.8
Focal length: 24.1 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.