Contrast ratio of NEC MultiSync 20WGX2

Black
Contrast ratio	521:1 (edge: 667:1)
Monitor model	NEC MultiSync 20WGX2
Submitted	13 Jan 2012 21:56 CET, by 217.118..
Camera model	Panasonic DMC-TZ7
Processing remarks	Note: image file 2: suggested exposure time: 1/280 s (Set EV to -0.8) Note: image file 3: suggested exposure time: 2.4 s (Set EV to +2.2)
Screen photo	[open image]
Luminance	0.22 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–3.38 stops (aim for –2 to –3)
Exposure spread	0.47 stops
Area used for calculation	0.361 x 0.361
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 1
White
Screen photo	[open image]
Luminance	116 cd/m2
Luminance spread	10 cd/m2 (2 standard deviations)
Exposure value	–0.68 stops (aim for –2 to –3)
Exposure spread	0.13 stops
Area used for calculation	0.361 x 0.361
Camera settings	Exposure time: 1/80 ISO: 400 F-number: 3.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 1
Black at screen edge
Screen photo	[open image]
Luminance	0.17 cd/m2
Luminance spread	0.05 cd/m2 (2 standard deviations)
Exposure value	–3.74 stops (aim for –2 to –3)
Exposure spread	0.4 stops
Area used for calculation	0.361 x 0.361
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.3 Focal length: 25 mm (35 mm equivalent) Exposure compensation: 1

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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.