Contrast ratio of LG Flatron L1919S

Black
Contrast ratio	470:1 (edge: 596:1)
Monitor model	LG Flatron L1919S
Submitted	02 Sep 2008 22:05 CEST, by 213.37..
Camera model	Canon EOS 400D DIGITAL
Processing remarks	Note: image file 1: suggested exposure time: 1.8 s (Set EV to -1.1)
Screen photo	[open image]
Luminance	0.26 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–1.36 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.39 x 0.44
Camera settings	Exposure time: 4 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	120 cd/m2
Luminance spread	32 cd/m2 (2 standard deviations)
Exposure value	–1.8 stops (aim for –2 to –3)
Exposure spread	0.38 stops
Area used for calculation	0.39 x 0.44
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.2 cd/m2
Luminance spread	0.03 cd/m2 (2 standard deviations)
Exposure value	–1.7 stops (aim for –2 to –3)
Exposure spread	0.23 stops
Area used for calculation	0.39 x 0.44
Camera settings	Exposure time: 4 ISO: 400 F-number: 3.5 Focal length: 28.1 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.