Contrast ratio results

Black
Contrast ratio	651:1
Monitor model
Submitted	28 Dec 2015 14:17 CET, by 119.104..
Camera model	samsung SCV31
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 174.6 s (Set EV to +2.4) Note: image file 2: suggested exposure time: 0.3 s (Set EV to -6.9)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–9.95 stops (aim for –2 to –3)
Exposure spread	0.42 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	0.51 cd/m2
Luminance spread	0.11 cd/m2 (2 standard deviations)
Exposure value	–0.6 stops (aim for –2 to –3)
Exposure spread	0.32 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

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.