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

Contrast ratio results

Contrast ratio 7142:1
Monitor model
Submitted 22 Sep 2020 00:02 CEST, by 87.181.*.*
Camera model Canon EOS M50
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –2.65 stops   (aim for –2 to –3)
Exposure spread 0.49 stops
Area used for calculation 0.324 x 0.364
Camera settings Exposure time: 2.6   ISO: 800   F-number: 3.5
Focal length: 23.3 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
[open image]
Luminance 575 cd/m2
Luminance spread 196 cd/m2 (2 standard deviations)
Exposure value –2.85 stops   (aim for –2 to –3)
Exposure spread 0.5 stops
Area used for calculation 0.324 x 0.364
Camera settings Exposure time: 1/3158   ISO: 800   F-number: 3.5
Focal length: 23.3 mm   (35 mm equivalent)
Exposure compensation: 3

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.