Contrast ratio results

Contrast ratio 892:1
Monitor model
Submitted 08 Feb 2015 17:46 CET, by 109.109.*.*
Camera model Sony DSC-S2100
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.1 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.38 stops   (aim for –2 to –3)
Exposure spread 0.58 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1   ISO: 800   F-number: 3.1
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 88 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –2.23 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/400   ISO: 800   F-number: 3.1
Focal length: 0 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.