Contrast ratio results

Black
Contrast ratio	8:1
Monitor model
Submitted	29 Aug 2013 21:38 CEST, by 92.83..
Camera model	SAMSUNG GT-I8160
Processing remarks	Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). 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: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). 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.
Screen photo	[open image]
Luminance	26 cd/m2
Luminance spread	11 cd/m2 (2 standard deviations)
Exposure value	–1.61 stops (aim for –2 to –3)
Exposure spread	0.61 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/13 ISO: 100 F-number: 2.7 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	213 cd/m2
Luminance spread	130 cd/m2 (2 standard deviations)
Exposure value	–1.81 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/120 ISO: 100 F-number: 2.7 Focal length: 0 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.