Contrast ratio results

Black
Contrast ratio	83:1
Monitor model
Submitted	05 Dec 2018 10:55 CET, by 130.225..
Camera model	OnePlus A5010
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 3.7 s (Set EV to +3.9) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/23 s (Set EV to -2.5)
Screen photo	[open image]
Luminance	0.03 cd/m2
Luminance spread	0.02 cd/m2 (2 standard deviations)
Exposure value	–6.38 stops (aim for –2 to –3)
Exposure spread	1.03 stops
Area used for calculation	0.331 x 0.381
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 1.7 Focal length: 24 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	2.47 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–-0 stops (aim for –2 to –3)
Exposure spread	0 stops
Area used for calculation	0.347 x 0.347
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 1.7 Focal length: 24 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.