Contrast ratio results

Contrast ratio 15:1
Monitor model
Submitted 26 Dec 2020 09:26 CET, by 66.214.*.*
Camera model Google Pixel 4a 5G
Processing remarks


Black
Screen photo
Luminance 1.15 cd/m2
Luminance spread 0.16 cd/m2 (2 standard deviations)
Exposure value –2.44 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.323 x 0.484
Camera settings Exposure time: 1/10   ISO: 395   F-number: 1.7
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 17 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –2.53 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.33 x 0.45
Camera settings Exposure time: 1/160   ISO: 395   F-number: 1.7
Focal length: 25 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.