Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio results

Contrast ratio 1080:1 (edge: 948:1)
Monitor model
Submitted 10 Jun 2023 16:14 CEST, by 92.54.*.*
Camera model Xiaomi M2012K11AG
Processing remarks


Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.87 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 2.5   ISO: 400   F-number: 1.8
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 41 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –2.76 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 1/400   ISO: 400   F-number: 1.8
Focal length: 25 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –2.68 stops   (aim for –2 to –3)
Exposure spread 0.68 stops
Area used for calculation 0.361 x 0.361
Camera settings Exposure time: 2.5   ISO: 400   F-number: 1.8
Focal length: 25 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.