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

Contrast ratio results

Contrast ratio 121:1
Monitor model
Submitted 08 Dec 2015 05:42 CET, by 174.24.*.*
Camera model Canon EOS 7D Mark II
Processing remarks

Note: image file 1: suggested exposure time: 1/6 s (Set EV to -1.9)

Black
Screen photo
[open image]
Luminance 1.8 cd/m2
Luminance spread 0.69 cd/m2 (2 standard deviations)
Exposure value –0.64 stops   (aim for –2 to –3)
Exposure spread 0.56 stops
Area used for calculation 0.876 x 0.986
Camera settings Exposure time: 0.6   ISO: 400   F-number: 2.8
Focal length: 63.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 218 cd/m2
Luminance spread 141 cd/m2 (2 standard deviations)
Exposure value –1.6 stops   (aim for –2 to –3)
Exposure spread 0.97 stops
Area used for calculation 0.876 x 0.986
Camera settings Exposure time: 1/395   ISO: 400   F-number: 2.8
Focal length: 63.1 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.