Contrast ratio results for L1751SQ

Black
Contrast ratio	276:1
Monitor model	L1751SQ
Submitted	26 Mar 2021 14:51 CET, by 91.245..
Camera model	Xiaomi Redmi 7
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 4.6 s (Set EV to +2.2) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/59 s (Set EV to +3.1)
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.02 cd/m2 (2 standard deviations)
Exposure value	–4.72 stops (aim for –2 to –3)
Exposure spread	0.85 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1 ISO: 400 F-number: 2.2 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	11 cd/m2
Luminance spread	3 cd/m2 (2 standard deviations)
Exposure value	–5.57 stops (aim for –2 to –3)
Exposure spread	0.47 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/501 ISO: 400 F-number: 2.2 Focal length: 0 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.