Contrast ratio results for Asus LCD notebook

Black
Contrast ratio	148:1
Monitor model	Asus LCD notebook
Submitted	06 Sep 2011 00:38 CEST, by 151.25..
Camera model	SAMSUNG TECHWIN NV24HD VLUU NV24HD LANDI
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: 0.9 s (Set EV to +1.9) 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: 1/160 s (Set EV to +1.3)
Screen photo	[open image]
Luminance	0.33 cd/m2
Luminance spread	0.87 cd/m2 (2 standard deviations)
Exposure value	–4.36 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.347 x 0.347
Camera settings	Exposure time: 1/4 ISO: 400 F-number: 2.8 Focal length: 24 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	48 cd/m2
Luminance spread	23 cd/m2 (2 standard deviations)
Exposure value	–3.8 stops (aim for –2 to –3)
Exposure spread	0.69 stops
Area used for calculation	0.347 x 0.347
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 2.8 Focal length: 24 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.