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

Contrast ratio results

Contrast ratio 10770:1
Monitor model
Submitted 07 Jul 2022 10:02 CEST, by 37.11.*.*
Camera model Xiaomi Mi 9T
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 101.4 s (Set EV to +11.6)
Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.8)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –14.07 stops   (aim for –2 to –3)
Exposure spread 2.06 stops
Area used for calculation 0.425 x 0.318
Camera settings Exposure time: 1/30   ISO: 100   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 46 cd/m2
Luminance spread 2 cd/m2 (2 standard deviations)
Exposure value –0.68 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.425 x 0.318
Camera settings Exposure time: 1/30   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.