Contrast ratio results for NEC 2690WUXI

Black
Contrast ratio	649:1
Monitor model	NEC 2690WUXI
Submitted	22 Jan 2011 23:05 CET, by 79.163..
Camera model	Canon EOS 50D
Processing remarks	Warning: image file 1: camera was zoomed out too much. Warning: image file 1: automatic white balance can cause inaccuracies. Note: image file 1: suggested exposure time: 2.3 s (Set EV to +1.2) Warning: image file 2: camera was zoomed out too much. Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–3.69 stops (aim for –2 to –3)
Exposure spread	0.07 stops
Area used for calculation	0.1 x 0.113
Camera settings	Exposure time: 1 ISO: 800 F-number: 4 Focal length: 0.6 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	86 cd/m2
Luminance spread	3 cd/m2 (2 standard deviations)
Exposure value	–2.35 stops (aim for –2 to –3)
Exposure spread	0.05 stops
Area used for calculation	0.1 x 0.113
Camera settings	Exposure time: 1/256 ISO: 800 F-number: 4 Focal length: 0.6 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.