Contrast ratio results

Contrast ratio 660:1
Monitor model
Submitted 21 May 2011 22:05 CEST, by 74.13.*.*
Camera model Nikon E2200
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 1/89 s (Set EV to -1.2)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.27 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –2.81 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1.5   ISO: 200   F-number: 2.6
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 182 cd/m2
Luminance spread 37 cd/m2 (2 standard deviations)
Exposure value –1.27 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/38   ISO: 50   F-number: 2.6
Focal length: 36 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.