Contrast ratio results for BenQ GW2470H

Contrast ratio 3.32239e+06:1
Monitor model BenQ GW2470H
Submitted 18 Nov 2015 10:32 CET, by 124.168.*.*
Camera model SAMSUNG GT-I9305
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: 9480.8 s (Set EV to +17.1)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –19.62 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/15   ISO: 400   F-number: 2.6
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 90 cd/m2
Luminance spread 23 cd/m2 (2 standard deviations)
Exposure value –1.69 stops   (aim for –2 to –3)
Exposure spread 0.37 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/50   ISO: 100   F-number: 2.6
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.