Contrast ratio results for Dell S2340m

Contrast ratio 1423:1 (edge: 650:1)
Monitor model Dell S2340m
Submitted 25 Nov 2012 07:34 CET, by 209.215.*.*
Camera model Nikon D7000
Processing remarks

Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Overexposed. Please decrease the shutter time.

Black
Screen photo
Luminance 0.14 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –3.04 stops   (aim for –2 to –3)
Exposure spread 0.83 stops
Area used for calculation 0.721 x 0.816
Camera settings Exposure time: 0.6   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: -1
White
Screen photo
Luminance 200 cd/m2
Luminance spread 100 cd/m2 (2 standard deviations)
Exposure value –1.47 stops   (aim for –2 to –3)
Exposure spread 0.74 stops
Area used for calculation 0.721 x 0.816
Camera settings Exposure time: 1/800   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.31 cd/m2
Luminance spread 0.86 cd/m2 (2 standard deviations)
Exposure value –2.17 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.721 x 0.816
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 1

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.