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Contrast ratio results for ASUS N56VB

Contrast ratio 633:1 (edge: 708:1)
Monitor model ASUS N56VB
Submitted 16 Nov 2013 07:00 CET, by 139.195.*.*
Camera model Nikon D3100
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.0 s (Set EV to +2.0)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 1.1 s (Set EV to +2.1)

Black
Screen photo
[open image]
Luminance 0.47 cd/m2
Luminance spread 0.27 cd/m2 (2 standard deviations)
Exposure value –4.48 stops   (aim for –2 to –3)
Exposure spread 0.86 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 297 cd/m2
Luminance spread 35 cd/m2 (2 standard deviations)
Exposure value –1.82 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.42 cd/m2
Luminance spread 0.17 cd/m2 (2 standard deviations)
Exposure value –4.64 stops   (aim for –2 to –3)
Exposure spread 0.6 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 27 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.