Contrast ratio results

Black
Contrast ratio	31346:1
Monitor model
Submitted	06 Jan 2022 07:16 CET, by 5.12..
Camera model	HUAWEI MAR-LX1A
Processing remarks	Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. 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 ISO settings are not the same.
Screen photo	[open image]
Luminance	11562 cd/m2
Luminance spread	12467 cd/m2 (2 standard deviations)
Exposure value	–15.55 stops (aim for –2 to –3)
Exposure spread	1.74 stops
Area used for calculation	0.39 x 0.39
Camera settings	Exposure time: 1/99996336 ISO: 500 F-number: 1.8 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	3.62407e+08 cd/m2
Luminance spread	4.335e+07 cd/m2 (2 standard deviations)
Exposure value	–0.93 stops (aim for –2 to –3)
Exposure spread	0.17 stops
Area used for calculation	0.358 x 0.477
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 1.8 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.