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Contrast ratio results for asus ve228t

Contrast ratio 19324:1 (edge: 22358:1)
Monitor model asus ve228t
Submitted 01 May 2015 13:00 CEST, by 36.238.*.*
Camera model HTC Desire 600
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 31.2 s (Set EV to +8.4)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 36.1 s (Set EV to +8.6)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –10.92 stops   (aim for –2 to –3)
Exposure spread 0.81 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/11   ISO: 400   F-number: 2
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 94 cd/m2
Luminance spread 18 cd/m2 (2 standard deviations)
Exposure value –1.81 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/120   ISO: 125   F-number: 2
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –11.13 stops   (aim for –2 to –3)
Exposure spread 2.76 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/11   ISO: 400   F-number: 2
Focal length: 0 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.