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

Contrast ratio results

Contrast ratio 1465:1
Monitor model
Submitted 14 Feb 2022 19:16 CET, by 109.168.*.*
Camera model Xiaomi Mi 9 SE
Processing remarks

Note: image file 2: suggested exposure time: 1/110 s (Set EV to +1.2)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.23 stops   (aim for –2 to –3)
Exposure spread 1.13 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1   ISO: 800   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 48 cd/m2
Luminance spread 11 cd/m2 (2 standard deviations)
Exposure value –3.67 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/250   ISO: 100   F-number: 1.7
Focal length: 26 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.