Contrast ratio results for samsung

Black
Contrast ratio	75:1 (edge: 67:1)
Monitor model	samsung
Submitted	12 Mar 2017 02:52 CET, by 42.113..
Camera model	Nokia N8-00
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 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent). Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.7) 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 ISO settings are not the same.
Screen photo	[open image]
Luminance	1.1 cd/m2
Luminance spread	0.67 cd/m2 (2 standard deviations)
Exposure value	–2.61 stops (aim for –2 to –3)
Exposure spread	0.91 stops
Area used for calculation	0.528 x 0.704
Camera settings	Exposure time: 1/8 ISO: 800 F-number: 2.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	82 cd/m2
Luminance spread	19 cd/m2 (2 standard deviations)
Exposure value	–0.8 stops (aim for –2 to –3)
Exposure spread	0.33 stops
Area used for calculation	0.528 x 0.704
Camera settings	Exposure time: 1/33 ISO: 155 F-number: 2.8 Focal length: 0 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	1.23 cd/m2
Luminance spread	0.42 cd/m2 (2 standard deviations)
Exposure value	–2.45 stops (aim for –2 to –3)
Exposure spread	0.5 stops
Area used for calculation	0.528 x 0.704
Camera settings	Exposure time: 1/8 ISO: 800 F-number: 2.8 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.