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

Contrast ratio results

Contrast ratio 629:1
Monitor model
Submitted 17 Jun 2013 09:05 CEST, by 208.120.*.*
Camera model Sony NEX-5R
Processing remarks


Black
Screen photo
[open image]
Luminance 0.43 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –1.97 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.333 x 0.376
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 2.7
White
Screen photo
[open image]
Luminance 270 cd/m2
Luminance spread 38 cd/m2 (2 standard deviations)
Exposure value –1.31 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.333 x 0.376
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 1.3
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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.