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Contrast ratio of qx2710

Contrast ratio 1086:1 (edge: 1109:1)
Monitor model qx2710
Submitted 09 Nov 2015 16:04 CET, by 84.251.*.*
Camera model Canon DIGITAL IXUS 85 IS
Processing remarks

Note: image file 1: suggested exposure time: 2.2 s (Set EV to +5.1)
Note: image file 2: suggested exposure time: 1/490 s (Set EV to +2.0)
Note: image file 3: suggested exposure time: 2.2 s (Set EV to +5.2)

Black
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –3.64 stops   (aim for –2 to –3)
Exposure spread 1.04 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 4
White
Screen photo
[open image]
Luminance 146 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –0.52 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1/125   ISO: 400   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 4
Black at screen edge
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –3.67 stops   (aim for –2 to –3)
Exposure spread 1.16 stops
Area used for calculation 0.494 x 0.494
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 34.2 mm   (35 mm equivalent)
Exposure compensation: 4

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.