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

Contrast ratio results

Contrast ratio 1121:1
Monitor model
Submitted 17 Oct 2018 08:00 CEST, by 110.23.*.*
Camera model Canon EOS Kiss X4
Processing remarks

Note: image file 1: suggested exposure time: 3.7 s (Set EV to +0.3)

Black
Screen photo
[open image]
Luminance 0.16 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –0.78 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 12.3   ISO: 400   F-number: 4
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 182 cd/m2
Luminance spread 43 cd/m2 (2 standard deviations)
Exposure value –1.89 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1/197   ISO: 400   F-number: 4
Focal length: 28.3 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.