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

Contrast ratio results

Contrast ratio 360:1
Monitor model
Submitted 04 Mar 2022 12:32 CET, by 111.220.*.*
Camera model Canon EOS 5D Mark III
Processing remarks

Note: image file 2: suggested exposure time: 1/430 s (Set EV to -1.7)

Black
Screen photo
[open image]
Luminance 0.36 cd/m2
Luminance spread 0.18 cd/m2 (2 standard deviations)
Exposure value –2.57 stops   (aim for –2 to –3)
Exposure spread 0.75 stops
Area used for calculation 0.324 x 0.364
Camera settings Exposure time: 0.8   ISO: 800   F-number: 4
Focal length: 23.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 130 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –0.75 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.324 x 0.364
Camera settings Exposure time: 1/128   ISO: 800   F-number: 4
Focal length: 23.3 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.