Contrast ratio results

Contrast ratio 1:1
Monitor model
Submitted 05 Nov 2022 11:37 CET, by 66.189.*.*
Camera model samsung SM-G781U
Processing remarks

Note: image file 1: suggested exposure time: 0.6 s (Set EV to +0.4)

Black
Screen photo
Luminance 0.2 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.79 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -0.9
White
Screen photo
Luminance 0.21 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.45 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.425 x 0.319
Camera settings Exposure time: 0.3   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -0.9

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.