Contrast ratio of Westinghouse

Contrast ratio 302:1
Monitor model Westinghouse
Submitted 04 Sep 2008 02:29 CEST, by 24.118.*.*
Camera model Canon EOS 40D
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
Luminance 0.33 cd/m2
Luminance spread 0.13 cd/m2 (2 standard deviations)
Exposure value –3.32 stops   (aim for –2 to –3)
Exposure spread 0.58 stops
Area used for calculation 0.404 x 0.454
Camera settings Exposure time: 0.8   ISO: 400   F-number: 3.5
Focal length: 29.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 99 cd/m2
Luminance spread 131 cd/m2 (2 standard deviations)
Exposure value –2.14 stops   (aim for –2 to –3)
Exposure spread 2.3 stops
Area used for calculation 0.404 x 0.454
Camera settings Exposure time: 1/166   ISO: 400   F-number: 3.5
Focal length: 29.1 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.