Contrast ratio of LG Flatron W2241T

Black
Contrast ratio	1351:1 (edge: 1435:1)
Monitor model	LG Flatron W2241T
Submitted	07 Aug 2008 22:55 CEST, by 216.16..
Camera model	Canon EOS DIGITAL REBEL XT
Processing remarks
Screen photo	[open image]
Luminance	0.3 cd/m2
Luminance spread	0.1 cd/m2 (2 standard deviations)
Exposure value	–3.1 stops (aim for –2 to –3)
Exposure spread	0.45 stops
Area used for calculation	0.39 x 0.439
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.5 Focal length: 28.1 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	412 cd/m2
Luminance spread	92 cd/m2 (2 standard deviations)
Exposure value	–1.35 stops (aim for –2 to –3)
Exposure spread	0.32 stops
Area used for calculation	0.39 x 0.439
Camera settings	Exposure time: 1/400 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	0.29 cd/m2
Luminance spread	0.09 cd/m2 (2 standard deviations)
Exposure value	–3.19 stops (aim for –2 to –3)
Exposure spread	0.47 stops
Area used for calculation	0.39 x 0.439
Camera settings	Exposure time: 1 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.