Contrast ratio results

Contrast ratio 6076:1
Monitor model
Submitted 14 Jan 2013 04:43 CET, by 118.90.*.*
Camera model Nokia C5-00
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 9.2 s (Set EV to +6.2)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/150 s (Set EV to -2.1)
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 –8.71 stops   (aim for –2 to –3)
Exposure spread 1.27 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/8   ISO: 800   F-number: 1.4
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 24 cd/m2
Luminance spread 3 cd/m2 (2 standard deviations)
Exposure value –0.36 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.528 x 0.528
Camera settings Exposure time: 1/33   ISO: 177   F-number: 1.4
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.