Contrast ratio results

Contrast ratio 345:1
Monitor model
Submitted 15 May 2013 05:17 CEST, by 208.120.*.*
Camera model Sony NEX-5R
Processing remarks

Note: image file 1: suggested exposure time: 0.5 s (Set EV to +1.7)
Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
Luminance 0.54 cd/m2
Luminance spread 0.16 cd/m2 (2 standard deviations)
Exposure value –1.24 stops   (aim for –2 to –3)
Exposure spread 0.43 stops
Area used for calculation 0.333 x 0.376
Camera settings Exposure time: 1.3   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 3
White
Screen photo
Luminance 188 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –0.16 stops   (aim for –2 to –3)
Exposure spread 0.04 stops
Area used for calculation 0.333 x 0.376
Camera settings Exposure time: 1/125   ISO: 400   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 3

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.