Contrast ratio results

Black
Contrast ratio	1387:1
Monitor model
Submitted	25 Aug 2011 20:13 CEST, by 68.118..
Camera model	Samsung Techwin KENOX S860 / Samsung S8
Processing remarks	Warning: image file 1: camera was zoomed in too much. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 19.0 s (Set EV to +4.2) Warning: Image F-number settings are not the same. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	0.05 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–6.75 stops (aim for –2 to –3)
Exposure spread	0.69 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1 ISO: 400 F-number: 5.2 Focal length: 114 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	75 cd/m2
Luminance spread	14 cd/m2 (2 standard deviations)
Exposure value	–3.02 stops (aim for –2 to –3)
Exposure spread	0.28 stops
Area used for calculation	0.549 x 0.549
Camera settings	Exposure time: 1/362 ISO: 400 F-number: 2.8 Focal length: 38 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.