Contrast ratio results

Black
Contrast ratio	16:1
Monitor model
Submitted	22 Jul 2014 15:37 CEST, by 24.177..
Camera model	SAMSUNG SM-G900V
Processing remarks	Warning: using the flash makes no sense. Warning: image file 1: automatic white balance can cause inaccuracies. Warning: using the flash makes no sense. Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Overexposed. Please decrease the shutter time.
Screen photo	[open image]
Luminance	449 cd/m2
Luminance spread	876 cd/m2 (2 standard deviations)
Exposure value	–2.15 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.731 x 0.308
Camera settings	Exposure time: 1/193 ISO: 40 F-number: 2.2 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	7013 cd/m2
Luminance spread	12556 cd/m2 (2 standard deviations)
Exposure value	–1.39 stops (aim for –2 to –3)
Exposure spread	4.18 stops
Area used for calculation	0.731 x 0.308
Camera settings	Exposure time: 1/1771 ISO: 40 F-number: 2.2 Focal length: 31 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.