Contrast ratio results

Contrast ratio 754:1
Monitor model
Submitted 21 Nov 2020 01:39 CET, by 31.167.*.*
Camera model Apple iPhone 11
Processing remarks


Black
Screen photo
Luminance 0.23 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –2.39 stops   (aim for –2 to –3)
Exposure spread 0.81 stops
Area used for calculation 0.229 x 0.172
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 14 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 177 cd/m2
Luminance spread 14 cd/m2 (2 standard deviations)
Exposure value –0.81 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.229 x 0.172
Camera settings Exposure time: 1/251   ISO: 400   F-number: 2.4
Focal length: 14 mm   (35 mm equivalent)
Exposure compensation: -1.59

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.