Contrast ratio results

Black
Contrast ratio	272:1
Monitor model
Submitted	07 May 2021 03:56 CEST, by 77.78..
Camera model	samsung SM-G960F
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/220 s (Set EV to -1.8) Warning: Image ISO settings are not the same. Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0.55 cd/m2
Luminance spread	0.42 cd/m2 (2 standard deviations)
Exposure value	–3.06 stops (aim for –2 to –3)
Exposure spread	1.14 stops
Area used for calculation	0.345 x 0.46
Camera settings	Exposure time: 1/24 ISO: 1000 F-number: 1.5 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	150 cd/m2
Luminance spread	20 cd/m2 (2 standard deviations)
Exposure value	–0.65 stops (aim for –2 to –3)
Exposure spread	0.2 stops
Area used for calculation	0.345 x 0.46
Camera settings	Exposure time: 1/60 ISO: 125 F-number: 2.4 Focal length: 26 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.