Contrast ratio results

Black
Contrast ratio	1:1
Monitor model
Submitted	09 May 2024 08:16 CEST, by 181.134..
Camera model	Xiaomi 21121119VL
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: 1548.0 s (Set EV to +10.6) Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Note: image file 2: suggested exposure time: 1069.8 s (Set EV to +1.4)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–13.1 stops (aim for –2 to –3)
Exposure spread	1.62 stops
Area used for calculation	0.528 x 0.526
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–3.93 stops (aim for –2 to –3)
Exposure spread	0.44 stops
Area used for calculation	0.528 x 0.526
Camera settings	Exposure time: 396.2 ISO: 400 F-number: 1.8 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.