Contrast ratio results for NEC 20WGX2

Black
Contrast ratio	359:1
Monitor model	NEC 20WGX2
Submitted	13 Apr 2009 08:52 CEST, by 217.114..
Camera model	Canon PowerShot A570 IS
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Screen photo	[open image]
Luminance	0.36 cd/m2
Luminance spread	0.1 cd/m2 (2 standard deviations)
Exposure value	–2.02 stops (aim for –2 to –3)
Exposure spread	0.41 stops
Area used for calculation	0.495 x 0.495
Camera settings	Exposure time: 1/4 ISO: 1 F-number: 2.6 Focal length: 34.3 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	128 cd/m2
Luminance spread	78 cd/m2 (2 standard deviations)
Exposure value	–1.82 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	0.495 x 0.495
Camera settings	Exposure time: 1/1244 ISO: 1 F-number: 2.6 Focal length: 34.3 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.