Contrast ratio results for Dell S2740L

Contrast ratio 356:1
Monitor model Dell S2740L
Submitted 11 Dec 2013 06:00 CET, by 50.184.*.*
Camera model Canon EOS 60D
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 4.5 s (Set EV to +3.5)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/78 s (Set EV to +2.3)

Black
Screen photo
Luminance 0.13 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –6.01 stops   (aim for –2 to –3)
Exposure spread 0.26 stops
Area used for calculation 0.524 x 0.589
Camera settings Exposure time: 0.4   ISO: 400   F-number: 4
Focal length: 37.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 47 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –4.84 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.524 x 0.589
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4
Focal length: 37.7 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.