Contrast ratio results

Black
Contrast ratio	954:1
Monitor model
Submitted	30 Jan 2021 02:57 CET, by 62.168..
Camera model	Xiaomi MI MAX 2
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 34.1 s (Set EV to +4.1) image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/28 s (Set EV to +4.2)
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–6.59 stops (aim for –2 to –3)
Exposure spread	0.21 stops
Area used for calculation	0.36 x 0.27
Camera settings	Exposure time: 2 ISO: 400 F-number: 2.2 Focal length: 22 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	5 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–6.66 stops (aim for –2 to –3)
Exposure spread	0.71 stops
Area used for calculation	0.36 x 0.27
Camera settings	Exposure time: 1/500 ISO: 400 F-number: 2.2 Focal length: 22 mm (35 mm equivalent) Exposure compensation: 0

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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.