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Contrast ratio of HP Envy 24

Contrast ratio 422:1 (edge: 422:1)
Monitor model HP Envy 24
Submitted 18 Jun 2018 09:06 CEST, by 68.118.*.*
Camera model Canon EOS REBEL SL1
Processing remarks


Black
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.4 cd/m2 (2 standard deviations)
Exposure value –2.99 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.951 x 1
Camera settings Exposure time: 1.6   ISO: 400   F-number: 3.5
Focal length: 68.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 87 cd/m2
Luminance spread 43 cd/m2 (2 standard deviations)
Exposure value –2.94 stops   (aim for –2 to –3)
Exposure spread 0.72 stops
Area used for calculation 0.951 x 1
Camera settings Exposure time: 1/256   ISO: 400   F-number: 3.5
Focal length: 68.5 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.21 cd/m2
Luminance spread 0.4 cd/m2 (2 standard deviations)
Exposure value –2.99 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.951 x 1
Camera settings Exposure time: 1.6   ISO: 400   F-number: 3.5
Focal length: 68.5 mm   (35 mm equivalent)
Exposure compensation: 0

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.