Contrast ratio results

Black
Contrast ratio	6.1725e+07:1
Monitor model
Submitted	22 Jun 2022 10:27 CEST, by 223.73..
Camera model	HUAWEI EVR-AL00
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. Note: image file 1: suggested exposure time: 1/92 s (Set EV to +23.4) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: Overexposed. Please decrease the shutter time.
Screen photo	[open image]
Luminance	11 cd/m2
Luminance spread	313 cd/m2 (2 standard deviations)
Exposure value	–25.88 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.52 x 0.292
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 1.8 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	6.91743e+08 cd/m2
Luminance spread	1.74889e+06 cd/m2 (2 standard deviations)
Exposure value	–0 stops (aim for –2 to –3)
Exposure spread	0 stops
Area used for calculation	0.52 x 0.292
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.