Contrast ratio results for iiyama G2530HSU

Black
Contrast ratio	2:1
Monitor model	iiyama G2530HSU
Submitted	29 Nov 2019 18:37 CET, by 83.23..
Camera model	HUAWEI PRA-LX1
Processing remarks	Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: Underexposed. Please increase the shutter time. Warning: image file 3: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 3: Underexposed. Please increase 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	4.33151e+07 cd/m2
Luminance spread	1.68321e+07 cd/m2 (2 standard deviations)
Exposure value	–4.58 stops (aim for –2 to –3)
Exposure spread	0.57 stops
Area used for calculation	0.611 x 0.259
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	7.76481e+07 cd/m2
Luminance spread	8.59036e+06 cd/m2 (2 standard deviations)
Exposure value	–3.74 stops (aim for –2 to –3)
Exposure spread	0.16 stops
Area used for calculation	0.611 x 0.259
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	1.74004e+07 cd/m2
Luminance spread	4.21164e+07 cd/m2 (2 standard deviations)
Exposure value	–5.89 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.345 x 0.458
Camera settings	Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 26 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.