Contrast ratio results

Black
Contrast ratio	3:1
Monitor model
Submitted	08 Apr 2021 14:57 CEST, by 111.125..
Camera model	HUAWEI EVA-L19
Processing remarks	Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Screen photo	[open image]
Luminance	8.76963e+07 cd/m2
Luminance spread	1.86323e+08 cd/m2 (2 standard deviations)
Exposure value	–3.56 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.358 x 0.477
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0.3
White
Screen photo	[open image]
Luminance	2.21811e+08 cd/m2
Luminance spread	5.18617e+07 cd/m2 (2 standard deviations)
Exposure value	–2.22 stops (aim for –2 to –3)
Exposure spread	0.34 stops
Area used for calculation	0.358 x 0.477
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0.3

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.