Contrast ratio results

Contrast ratio 539:1
Monitor model
Submitted 23 Apr 2008 13:27 CEST, by 82.65.*.*
Camera model Kodak CX7430 ZOOM DIGITAL CAMERA
Processing remarks

image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: Image F-number settings are not the same.

Black
Screen photo
Luminance 0.86 cd/m2
Luminance spread 0.39 cd/m2 (2 standard deviations)
Exposure value –1.85 stops   (aim for –2 to –3)
Exposure spread 0.67 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 0.5   ISO: 400   F-number: 2.7
Focal length: 34 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
Luminance 465 cd/m2
Luminance spread 62 cd/m2 (2 standard deviations)
Exposure value –2.93 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.491 x 0.491
Camera settings Exposure time: 1/512   ISO: 400   F-number: 5.7
Focal length: 34 mm   (35 mm equivalent)
Exposure compensation: -0.5

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.