Contrast ratio results for lje2251

Black
Contrast ratio	1:1
Monitor model	lje2251
Submitted	25 Dec 2012 17:43 CET, by 82.137..
Camera model	SAMSUNG TECHWIN CO. LTD. VLUU L83T/ Sams
Processing remarks	Warning: using the flash makes no sense. Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: using the flash makes no sense. Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: using the flash makes no sense. Warning: image file 3: automatic white balance can cause inaccuracies. image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Note: image file 3: suggested exposure time: 1/72 s (Set EV to -1.3) Warning: Image ISO settings are not the same. Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?
Screen photo	[open image]
Luminance	192 cd/m2
Luminance spread	223 cd/m2 (2 standard deviations)
Exposure value	–1.79 stops (aim for –2 to –3)
Exposure spread	1.91 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 1/30 ISO: 50 F-number: 3.6 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	212 cd/m2
Luminance spread	275 cd/m2 (2 standard deviations)
Exposure value	–1.65 stops (aim for –2 to –3)
Exposure spread	2.23 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 1/30 ISO: 50 F-number: 3.6 Focal length: 31 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	142 cd/m2
Luminance spread	189 cd/m2 (2 standard deviations)
Exposure value	–1.23 stops (aim for –2 to –3)
Exposure spread	2.32 stops
Area used for calculation	0.448 x 0.448
Camera settings	Exposure time: 1/30 ISO: 100 F-number: 3.6 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.