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Contrast ratio results for HP 2511x

Contrast ratio 1344:1 (edge: 1763:1)
Monitor model HP 2511x
Submitted 14 Dec 2014 19:24 CET, by 108.7.*.*
Camera model Canon PowerShot SD1400 IS
Processing remarks

Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 2.4 s (Set EV to +5.3)

Black
Screen photo
[open image]
Luminance 0.16 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.38 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.396 x 0.396
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 4
White
Screen photo
[open image]
Luminance 217 cd/m2
Luminance spread 14 cd/m2 (2 standard deviations)
Exposure value –0.3 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.396 x 0.396
Camera settings Exposure time: 1/159   ISO: 400   F-number: 2.8
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 4
Black at screen edge
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –3.77 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.396 x 0.396
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 27.4 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.