Contrast ratio results for ASUS / ROG Swift PG27VQ

Black
Contrast ratio	5640:1
Monitor model	ASUS / ROG Swift PG27VQ
Submitted	30 Mar 2021 02:22 CEST, by 176.179..
Camera model	HUAWEI ELS-NX9
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. Warning: image file 2: Overexposed. Please decrease the shutter time. Warning: image file 3: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 3: Overexposed. Please decrease the shutter time. Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	136319 cd/m2
Luminance spread	107054 cd/m2 (2 standard deviations)
Exposure value	–12.47 stops (aim for –2 to –3)
Exposure spread	1.2 stops
Area used for calculation	0.332 x 0.332
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 1.9 Focal length: 23 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	7.68814e+08 cd/m2
Luminance spread	6.55811e+06 cd/m2 (2 standard deviations)
Exposure value	–0.01 stops (aim for –2 to –3)
Exposure spread	0.01 stops
Area used for calculation	0.332 x 0.332
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 1.9 Focal length: 23 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	3.42271e+08 cd/m2
Luminance spread	6.90007e+08 cd/m2 (2 standard deviations)
Exposure value	–1.17 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.332 x 0.332
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 1.9 Focal length: 23 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.