Contrast ratio of BENQ gw2250

Contrast ratio 1445:1
Monitor model BENQ gw2250
Submitted 06 Jul 2013 06:54 CEST, by 117.65.*.*
Camera model Canon EOS 400D DIGITAL
Processing remarks

Note: image file 1: suggested exposure time: 5.7 s (Set EV to +1.5)

Black
Screen photo
Luminance 0.11 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –4.01 stops   (aim for –2 to –3)
Exposure spread 1.74 stops
Area used for calculation 0.394 x 0.431
Camera settings Exposure time: 2   ISO: 400   F-number: 4
Focal length: 28.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 154 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –2.48 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.379 x 0.472
Camera settings Exposure time: 1/250   ISO: 400   F-number: 4
Focal length: 28.1 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.