Contrast ratio results for Dell U3211H

Black
Contrast ratio	751:1
Monitor model	Dell U3211H
Submitted	13 Aug 2010 07:13 CEST, by 99.108..
Camera model	Canon EOS DIGITAL REBEL XT
Processing remarks	Warning: image file 1: camera was zoomed in too much. Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: camera was zoomed in too much.
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.02 cd/m2 (2 standard deviations)
Exposure value	–3.37 stops (aim for –2 to –3)
Exposure spread	0.18 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 0.3 ISO: 1 F-number: 2.8 Focal length: 156 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	101 cd/m2
Luminance spread	80 cd/m2 (2 standard deviations)
Exposure value	–3.05 stops (aim for –2 to –3)
Exposure spread	1.2 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/2000 ISO: 1 F-number: 2.8 Focal length: 156 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.