Contrast ratio results

Black
Contrast ratio	1379:1
Monitor model
Submitted	13 Jul 2022 06:49 CEST, by 104.34..
Camera model	samsung SM-S908U
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 8.9 s (Set EV to +0.1) Note: image file 2: suggested exposure time: 1/160 s (Set EV to -0.8)
Screen photo	[open image]
Luminance	0.11 cd/m2
Luminance spread	0.14 cd/m2 (2 standard deviations)
Exposure value	–4.65 stops (aim for –2 to –3)
Exposure spread	2.22 stops
Area used for calculation	0.305 x 0.406
Camera settings	Exposure time: 2 ISO: 50 F-number: 1.8 Focal length: 23 mm (35 mm equivalent) Exposure compensation: -2
White
Screen photo	[open image]
Luminance	153 cd/m2
Luminance spread	36 cd/m2 (2 standard deviations)
Exposure value	–3.67 stops (aim for –2 to –3)
Exposure spread	0.34 stops
Area used for calculation	0.305 x 0.406
Camera settings	Exposure time: 1/350 ISO: 50 F-number: 1.8 Focal length: 23 mm (35 mm equivalent) Exposure compensation: -2

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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.