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

Contrast ratio results

Contrast ratio 4712:1
Monitor model
Submitted 09 Dec 2020 23:37 CET, by 62.201.*.*
Camera model Xiaomi Mi A2 Lite
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.7 s (Set EV to +3.3)
Note: image file 2: suggested exposure time: 1/120 s (Set EV to -1.3)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –5.81 stops   (aim for –2 to –3)
Exposure spread 0.97 stops
Area used for calculation 0.35 x 0.438
Camera settings Exposure time: 1/14   ISO: 6890   F-number: 2.1
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 64 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –1.18 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.35 x 0.438
Camera settings Exposure time: 1/50   ISO: 129   F-number: 2.1
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.