Contrast ratio results for asus

Black
Contrast ratio	40209:1 (edge: 177:1)
Monitor model	asus
Submitted	02 Feb 2021 00:21 CET, by 31.223..
Camera model	Apple iPhone 6
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1.4 s (Set EV to +7.2) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 3: automatic white balance can cause inaccuracies. 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 ISO settings are not the same.
Screen photo	[open image]
Luminance	0.1 cd/m2
Luminance spread	0.18 cd/m2 (2 standard deviations)
Exposure value	–9.67 stops (aim for –2 to –3)
Exposure spread	3.93 stops
Area used for calculation	0.53 x 0.706
Camera settings	Exposure time: 1/100 ISO: 500 F-number: 2.2 Focal length: 40 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	4081 cd/m2
Luminance spread	7655 cd/m2 (2 standard deviations)
Exposure value	–1.72 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.419 x 0.419
Camera settings	Exposure time: 1/1041 ISO: 32 F-number: 2.2 Focal length: 29 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	23 cd/m2
Luminance spread	46 cd/m2 (2 standard deviations)
Exposure value	–1.89 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.419 x 0.419
Camera settings	Exposure time: 1/33 ISO: 160 F-number: 2.2 Focal length: 29 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.