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

Contrast ratio results

Contrast ratio 983:1
Monitor model
Submitted 07 Sep 2020 22:48 CEST, by 130.43.*.*
Camera model Canon EOS M50
Processing remarks


Black
Screen photo
[open image]
Luminance 0.32 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.4 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.559 x 0.419
Camera settings Exposure time: 2   ISO: 100   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
[open image]
Luminance 313 cd/m2
Luminance spread 21 cd/m2 (2 standard deviations)
Exposure value –3.46 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.559 x 0.419
Camera settings Exposure time: 1/512   ISO: 100   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: -2

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.