Contrast ratio results

Black
Contrast ratio	87597:1
Monitor model
Submitted	08 Jun 2020 20:54 CEST, by 180.190..
Camera model	samsung SM-A520F
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 10.0 s (Set EV to +6.6) Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/220 s (Set EV to -1.1) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–9.14 stops (aim for –2 to –3)
Exposure spread	1.81 stops
Area used for calculation	0.39 x 0.39
Camera settings	Exposure time: 1/10 ISO: 2000 F-number: 1.9 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	239 cd/m2
Luminance spread	6 cd/m2 (2 standard deviations)
Exposure value	–1.37 stops (aim for –2 to –3)
Exposure spread	0.03 stops
Area used for calculation	0.39 x 0.39
Camera settings	Exposure time: 1/100 ISO: 50 F-number: 1.9 Focal length: 27 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.