Contrast ratio results for GW2760HM

Contrast ratio 12914:1
Monitor model GW2760HM
Submitted 25 Aug 2013 21:09 CEST, by 178.252.*.*
Camera model Canon IXUS 125 HS
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 53.3 s (Set EV to +4.4)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.02 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –6.91 stops   (aim for –2 to –3)
Exposure spread 2.2 stops
Area used for calculation 0.348 x 0.348
Camera settings Exposure time: 2.5   ISO: 100   F-number: 2.7
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 267 cd/m2
Luminance spread 30 cd/m2 (2 standard deviations)
Exposure value –1.55 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.348 x 0.348
Camera settings Exposure time: 1/501   ISO: 400   F-number: 2.7
Focal length: 24.1 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.