Contrast ratio results

Contrast ratio 1437:1
Monitor model
Submitted 15 Jul 2012 00:31 CEST, by 69.232.*.*
Camera model Panasonic DMC-TZ5
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Note: image file 1: suggested exposure time: 33.4 s (Set EV to +1.2)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.05 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –3.66 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 15   ISO: 100   F-number: 3.3
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 71 cd/m2
Luminance spread 7 cd/m2 (2 standard deviations)
Exposure value –1.72 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.371 x 0.495
Camera settings Exposure time: 1/100   ISO: 400   F-number: 3.3
Focal length: 28 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.