Contrast ratio results

Contrast ratio 17714:1
Monitor model
Submitted 05 Oct 2014 13:48 CEST, by 174.70.*.*
Camera model SAMSUNG VLUU ST5000 ST5000 TL240
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 281.4 s (Set EV to +4.1)

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –6.64 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.448 x 0.448
Camera settings Exposure time: 16   ISO: 80   F-number: 3.3
Focal length: 31 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 130 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –2.52 stops   (aim for –2 to –3)
Exposure spread 0.03 stops
Area used for calculation 0.448 x 0.448
Camera settings Exposure time: 1/64   ISO: 80   F-number: 3.3
Focal length: 31 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.