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

Contrast ratio results

Contrast ratio 818:1 (edge: 386:1)
Monitor model
Submitted 05 Sep 2013 06:53 CEST, by 47.16.*.*
Camera model Canon EOS 60D
Processing remarks

Note: image file 3: suggested exposure time: 0.6 s (Set EV to -1.0)

Black
Screen photo
[open image]
Luminance 0.59 cd/m2
Luminance spread 0.6 cd/m2 (2 standard deviations)
Exposure value –2.55 stops   (aim for –2 to –3)
Exposure spread 1.61 stops
Area used for calculation 0.874 x 0.983
Camera settings Exposure time: 1.3   ISO: 400   F-number: 4.6
Focal length: 62.9 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 486 cd/m2
Luminance spread 108 cd/m2 (2 standard deviations)
Exposure value –1.88 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.874 x 0.983
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4.6
Focal length: 62.9 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 1.26 cd/m2
Luminance spread 0.49 cd/m2 (2 standard deviations)
Exposure value –1.47 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.874 x 0.983
Camera settings Exposure time: 1.3   ISO: 400   F-number: 4.6
Focal length: 62.9 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.