Contrast ratio results

Black
Contrast ratio	11294:1 (edge: 8731:1)
Monitor model
Submitted	10 Sep 2013 11:35 CEST, by 109.93..
Camera model	SAMSUNG GT-S7560
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. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 8.5 s (Set EV to +6.1) 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. Warning: image file 3: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 3: automatic white balance can cause inaccuracies. Warning: image file 3: Underexposed. Please increase the shutter time. Note: image file 3: suggested exposure time: 6.6 s (Set EV to +5.7) Warning: Image ISO settings are not the same.
Screen photo	[open image]
Luminance	0.03 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–8.59 stops (aim for –2 to –3)
Exposure spread	0.49 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/8 ISO: 400 F-number: 2.6 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	340 cd/m2
Luminance spread	51 cd/m2 (2 standard deviations)
Exposure value	–1.77 stops (aim for –2 to –3)
Exposure spread	0.22 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/100 ISO: 50 F-number: 2.6 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.04 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–8.21 stops (aim for –2 to –3)
Exposure spread	1.88 stops
Area used for calculation	0.528 x 0.528
Camera settings	Exposure time: 1/8 ISO: 400 F-number: 2.6 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.