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

Contrast ratio results

Contrast ratio 17255:1
Monitor model
Submitted 07 Mar 2024 06:03 CET, by 208.70.*.*
Camera model Xiaomi Mi 9T
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 138.9 s (Set EV to +4.1)
Note: image file 2: suggested exposure time: 1/120 s (Set EV to -1.0)

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –6.62 stops   (aim for –2 to –3)
Exposure spread 0.68 stops
Area used for calculation 0.351 x 0.435
Camera settings Exposure time: 8   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 14 cd/m2
Luminance spread 1 cd/m2 (2 standard deviations)
Exposure value –1.45 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.343 x 0.466
Camera settings Exposure time: 1/60   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
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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.