Contrast ratio results

Black
Contrast ratio	2:1
Monitor model
Submitted	28 Dec 2015 14:21 CET, by 119.104..
Camera model	samsung SCV31
Processing remarks	Note: image file 1: suggested exposure time: 0.4 s (Set EV to -6.3) Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/5 s (Set EV to -7.5)
Screen photo	[open image]
Luminance	0.32 cd/m2
Luminance spread	0.14 cd/m2 (2 standard deviations)
Exposure value	–1.25 stops (aim for –2 to –3)
Exposure spread	0.61 stops
Area used for calculation	0.404 x 0.404
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: -5
White
Screen photo	[open image]
Luminance	0.76 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–0.02 stops (aim for –2 to –3)
Exposure spread	0.07 stops
Area used for calculation	0.404 x 0.404
Camera settings	Exposure time: 1 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: -5

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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.