Contrast ratio results

Black
Contrast ratio	979:1
Monitor model
Submitted	04 Jan 2024 01:42 CET, by 156.204..
Camera model	samsung SM-G977U
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: 1/430 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	0.38 cd/m2
Luminance spread	0.02 cd/m2 (2 standard deviations)
Exposure value	–1.87 stops (aim for –2 to –3)
Exposure spread	0.08 stops
Area used for calculation	0.428 x 0.316
Camera settings	Exposure time: 1/9 ISO: 1250 F-number: 1.5 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	370 cd/m2
Luminance spread	6 cd/m2 (2 standard deviations)
Exposure value	–0.67 stops (aim for –2 to –3)
Exposure spread	0.02 stops
Area used for calculation	0.425 x 0.319
Camera settings	Exposure time: 1/120 ISO: 100 F-number: 2.4 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0

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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.