Contrast ratio results

Black
Contrast ratio	10156:1
Monitor model
Submitted	20 Oct 2010 12:42 CEST, by 72.202..
Camera model	SAMSUNG VLUU ST5000 ST5000 TL240
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. 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: 30.0 s (Set EV to +6.9) Warning: image file 2: automatic white balance can cause inaccuracies. Note: image file 2: suggested exposure time: 1/340 s (Set EV to -1.0)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–7.41 stops (aim for –2 to –3)
Exposure spread	0.59 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 1 ISO: 1 F-number: 3.3 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 2
White
Screen photo	[open image]
Luminance	35 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–1.23 stops (aim for –2 to –3)
Exposure spread	0.07 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 1/140 ISO: 1 F-number: 3.3 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0.3

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.