Contrast ratio results for Lg w2220p

Black
Contrast ratio	693:1
Monitor model	Lg w2220p
Submitted	12 Apr 2010 20:44 CEST, by 188.24..
Camera model	Nikon D40
Processing remarks	image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 4.0 s (Set EV to +10.6) image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 2: suggested exposure time: 1/170 s (Set EV to +1.2)
Screen photo	[open image]
Luminance	0.12 cd/m2
Luminance spread	0.79 cd/m2 (2 standard deviations)
Exposure value	–13.13 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.369 x 0.438
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	81 cd/m2
Luminance spread	18 cd/m2 (2 standard deviations)
Exposure value	–3.69 stops (aim for –2 to –3)
Exposure spread	0.32 stops
Area used for calculation	0.365 x 0.451
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 3.5 Focal length: 27 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.