Contrast ratio results for NEC MultiSync 20WGX2

Black
Contrast ratio	416:1 (edge: 483:1)
Monitor model	NEC MultiSync 20WGX2
Submitted	13 Jan 2012 22:23 CET, by 217.118..
Camera model	Panasonic DMC-TZ7
Processing remarks	Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0.3 cd/m2
Luminance spread	0.08 cd/m2 (2 standard deviations)
Exposure value	–2.3 stops (aim for –2 to –3)
Exposure spread	0.4 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 0.8 ISO: 800 F-number: 3.3 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0.33
White
Screen photo	[open image]
Luminance	123 cd/m2
Luminance spread	11 cd/m2 (2 standard deviations)
Exposure value	–1.79 stops (aim for –2 to –3)
Exposure spread	0.13 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 1/250 ISO: 800 F-number: 4 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.26 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–2.51 stops (aim for –2 to –3)
Exposure spread	0.29 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 0.8 ISO: 800 F-number: 3.3 Focal length: 31 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.