Contrast ratio results for Apple 24" LED Cinema Display

Contrast ratio 588:1
Monitor model Apple 24" LED Cinema Display
Submitted 07 Dec 2008 23:36 CET, by 71.167.*.*
Camera model Nikon D700
Processing remarks

Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
Luminance 0.68 cd/m2
Luminance spread 0.36 cd/m2 (2 standard deviations)
Exposure value –2.04 stops   (aim for –2 to –3)
Exposure spread 0.78 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 0.6   ISO: 400   F-number: 2.8
Focal length: 70 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 398 cd/m2
Luminance spread 169 cd/m2 (2 standard deviations)
Exposure value –2.07 stops   (aim for –2 to –3)
Exposure spread 0.62 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/1000   ISO: 400   F-number: 2.8
Focal length: 70 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.