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

Contrast ratio results

Contrast ratio 2567:1
Monitor model
Submitted 25 Dec 2016 08:58 CET, by 68.5.*.*
Camera model Canon EOS REBEL SL1
Processing remarks

Note: image file 2: suggested exposure time: 1/340 s (Set EV to +0.9)

Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –2.02 stops   (aim for –2 to –3)
Exposure spread 1.4 stops
Area used for calculation 0.771 x 0.867
Camera settings Exposure time: 10.4   ISO: 400   F-number: 4.6
Focal length: 55.5 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 276 cd/m2
Luminance spread 73 cd/m2 (2 standard deviations)
Exposure value –1.45 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.771 x 0.867
Camera settings Exposure time: 1/166   ISO: 400   F-number: 4.6
Focal length: 55.5 mm   (35 mm equivalent)
Exposure compensation: 2

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.