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Contrast ratio results for ViewSonic VA1913w

Contrast ratio 5843:1 (edge: 4201:1)
Monitor model ViewSonic VA1913w
Submitted 26 Jan 2017 22:48 CET, by 190.150.*.*
Camera model SAMSUNG NX3300
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 22.0 s (Set EV to +3.5)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 15.8 s (Set EV to +3.0)

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –8.96 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.539 x 0.404
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: -3
White
Screen photo
[open image]
Luminance 123 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –3.09 stops   (aim for –2 to –3)
Exposure spread 0.09 stops
Area used for calculation 0.539 x 0.404
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: -1
Black at screen edge
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –8.48 stops   (aim for –2 to –3)
Exposure spread 2.41 stops
Area used for calculation 0.539 x 0.404
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: -3

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.