Contrast ratio results

Contrast ratio 7846:1
Monitor model
Submitted 26 Apr 2014 16:20 CEST, by 58.35.*.*
Camera model Canon IXY DIGITAL 50
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: 8.2 s (Set EV to +6.9)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
Luminance 0.05 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –9.45 stops   (aim for –2 to –3)
Exposure spread 1.22 stops
Area used for calculation 0.624 x 0.624
Camera settings Exposure time: 1/15   ISO: 400   F-number: 3.2
Focal length: 43.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 369 cd/m2
Luminance spread 79 cd/m2 (2 standard deviations)
Exposure value –1.91 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.624 x 0.624
Camera settings Exposure time: 1/636   ISO: 400   F-number: 3.2
Focal length: 43.2 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.