Contrast ratio results for LG R480 laptop

Black
Contrast ratio	154:1
Monitor model	LG R480 laptop
Submitted	22 Aug 2010 17:05 CEST, by 189.110..
Camera model	Hewlett-Packard HP DSC CB350
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1.2 s (Set EV to +2.3) image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: Underexposed. Please increase the shutter time. Note: image file 2: suggested exposure time: 1/130 s (Set EV to +1.7)
Screen photo	[open image]
Luminance	0.28 cd/m2
Luminance spread	0.71 cd/m2 (2 standard deviations)
Exposure value	–4.78 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.549 x 0.549
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 3 Focal length: 38 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	43 cd/m2
Luminance spread	12 cd/m2 (2 standard deviations)
Exposure value	–4.16 stops (aim for –2 to –3)
Exposure spread	0.4 stops
Area used for calculation	0.549 x 0.549
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 3 Focal length: 38 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.