Contrast ratio results for ASUS VN247H

Black
Contrast ratio	220:1 (edge: 220:1)
Monitor model	ASUS VN247H
Submitted	12 Sep 2014 03:48 CEST, by 24.192..
Camera model	Panasonic DMC-FH5
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 2: suggested exposure time: 1/350 s (Set EV to -1.2) image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Screen photo	[open image]
Luminance	0.58 cd/m2
Luminance spread	0.34 cd/m2 (2 standard deviations)
Exposure value	–2.56 stops (aim for –2 to –3)
Exposure spread	0.86 stops
Area used for calculation	0.404 x 0.404
Camera settings	Exposure time: 0.6 ISO: 400 F-number: 3.1 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0.33
White
Screen photo	[open image]
Luminance	128 cd/m2
Luminance spread	26 cd/m2 (2 standard deviations)
Exposure value	–1.01 stops (aim for –2 to –3)
Exposure spread	0.3 stops
Area used for calculation	0.404 x 0.404
Camera settings	Exposure time: 1/125 ISO: 400 F-number: 3.1 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0.33
Black at screen edge
Screen photo	[open image]
Luminance	0.58 cd/m2
Luminance spread	0.34 cd/m2 (2 standard deviations)
Exposure value	–2.56 stops (aim for –2 to –3)
Exposure spread	0.86 stops
Area used for calculation	0.404 x 0.404
Camera settings	Exposure time: 0.6 ISO: 400 F-number: 3.1 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0.33

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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.