Contrast ratio results

Black
Contrast ratio	2574:1
Monitor model
Submitted	04 Nov 2019 00:23 CET, by 86.49..
Camera model	HUAWEI VOG-L29
Processing remarks	Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 1: Underexposed. Please increase the shutter time. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 2: Overexposed. Please decrease the shutter time.
Screen photo	[open image]
Luminance	105387 cd/m2
Luminance spread	99952 cd/m2 (2 standard deviations)
Exposure value	–11.34 stops (aim for –2 to –3)
Exposure spread	1.49 stops
Area used for calculation	0.39 x 0.39
Camera settings	Exposure time: 1/99996336 ISO: 800 F-number: 1.6 Focal length: 27 mm (35 mm equivalent) Exposure compensation: -0.3
White
Screen photo	[open image]
Luminance	2.71234e+08 cd/m2
Luminance spread	126316 cd/m2 (2 standard deviations)
Exposure value	–0.01 stops (aim for –2 to –3)
Exposure spread	0 stops
Area used for calculation	0.39 x 0.39
Camera settings	Exposure time: 1/99996336 ISO: 800 F-number: 1.6 Focal length: 27 mm (35 mm equivalent) Exposure compensation: -0.3

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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.