Contrast ratio results

Contrast ratio 53:1
Monitor model
Submitted 23 Apr 2008 12:54 CEST, by 82.65.*.*
Camera model Kodak CX7430 ZOOM DIGITAL CAMERA
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 1/260 s (Set EV to -1.5)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 7 cd/m2
Luminance spread 4 cd/m2 (2 standard deviations)
Exposure value –2.22 stops   (aim for –2 to –3)
Exposure spread 0.79 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1/8   ISO: 160   F-number: 2.7
Focal length: 34 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 354 cd/m2
Luminance spread 28 cd/m2 (2 standard deviations)
Exposure value –1 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1/91   ISO: 80   F-number: 2.7
Focal length: 34 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.