Contrast ratio results

Black
Contrast ratio	654:1 (edge: 789:1)
Monitor model
Submitted	14 Dec 2008 21:47 CET, by 82.173..
Camera model	Nikon D200
Processing remarks
Screen photo	[open image]
Luminance	0.42 cd/m2
Luminance spread	0.12 cd/m2 (2 standard deviations)
Exposure value	–2.36 stops (aim for –2 to –3)
Exposure spread	0.41 stops
Area used for calculation	0.723 x 0.81
Camera settings	Exposure time: 1.6 ISO: 400 F-number: 4 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	273 cd/m2
Luminance spread	29 cd/m2 (2 standard deviations)
Exposure value	–2.33 stops (aim for –2 to –3)
Exposure spread	0.15 stops
Area used for calculation	0.723 x 0.81
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 4 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.35 cd/m2
Luminance spread	0.09 cd/m2 (2 standard deviations)
Exposure value	–2.31 stops (aim for –2 to –3)
Exposure spread	0.39 stops
Area used for calculation	0.723 x 0.81
Camera settings	Exposure time: 2 ISO: 400 F-number: 4 Focal length: 52 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.