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

Contrast ratio results

Contrast ratio 390:1
Monitor model
Submitted 30 May 2019 15:58 CEST, by 179.35.*.*
Camera model Canon EOS Kiss X9
Processing remarks

Note: image file 1: suggested exposure time: 1/220 s (Set EV to +1.2)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.17 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –3.35 stops   (aim for –2 to –3)
Exposure spread 0.73 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 0.5   ISO: 1600   F-number: 4
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 65 cd/m2
Luminance spread 89 cd/m2 (2 standard deviations)
Exposure value –3.74 stops   (aim for –2 to –3)
Exposure spread 2.39 stops
Area used for calculation 0.389 x 0.437
Camera settings Exposure time: 1/512   ISO: 800   F-number: 4
Focal length: 28 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.