Contrast ratio results for XIAOMI MI CURVED 34 (2021)

Black
Contrast ratio	15:1
Monitor model	XIAOMI MI CURVED 34 (2021)
Submitted	30 Dec 2021 01:06 CET, by 94.71..
Camera model	samsung SM-G985F
Processing remarks	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: 1/9 s (Set EV to +5.3) image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 2: suggested exposure time: 1/130 s (Set EV to +1.4) image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 3: Underexposed. Please increase the shutter time. Note: image file 3: suggested exposure time: 1/23 s (Set EV to +3.9) Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	1.67 cd/m2
Luminance spread	10.68 cd/m2 (2 standard deviations)
Exposure value	–7.76 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.165 x 0.274
Camera settings	Exposure time: 1/350 ISO: 400 F-number: 2.2 Focal length: 13 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	24 cd/m2
Luminance spread	6 cd/m2 (2 standard deviations)
Exposure value	–3.89 stops (aim for –2 to –3)
Exposure spread	0.38 stops
Area used for calculation	0.165 x 0.274
Camera settings	Exposure time: 1/350 ISO: 400 F-number: 2.2 Focal length: 13 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	4.27 cd/m2
Luminance spread	16.46 cd/m2 (2 standard deviations)
Exposure value	–6.4 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.165 x 0.274
Camera settings	Exposure time: 1/350 ISO: 400 F-number: 2.2 Focal length: 13 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.