Contrast ratio results for Westinghouse LCM-22w3

Black
Contrast ratio	687:1
Monitor model	Westinghouse LCM-22w3
Submitted	05 Dec 2012 02:10 CET, by 72.227..
Camera model	Pentax Optio S40
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0.15 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–1.72 stops (aim for –2 to –3)
Exposure spread	0.69 stops
Area used for calculation	0.506 x 0.506
Camera settings	Exposure time: 3 ISO: 400 F-number: 2.6 Focal length: 35 mm (35 mm equivalent) Exposure compensation: 1.7
White
Screen photo	[open image]
Luminance	101 cd/m2
Luminance spread	18 cd/m2 (2 standard deviations)
Exposure value	–2.65 stops (aim for –2 to –3)
Exposure spread	0.26 stops
Area used for calculation	0.506 x 0.506
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 4.3 Focal length: 35 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.