Contrast ratio of Samsung 2243SN

Black
Contrast ratio	548:1 (edge: 398:1)
Monitor model	Samsung 2243SN
Submitted	06 Jan 2010 19:03 CET, by 81.182..
Camera model	Canon EOS 50D
Processing remarks	Note: image file 1: suggested exposure time: 2.6 s (Set EV to +1.4)
Screen photo	[open image]
Luminance	0.18 cd/m2
Luminance spread	0.17 cd/m2 (2 standard deviations)
Exposure value	–3.9 stops (aim for –2 to –3)
Exposure spread	1.49 stops
Area used for calculation	0.617 x 0.694
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.5 Focal length: 44.4 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	96 cd/m2
Luminance spread	46 cd/m2 (2 standard deviations)
Exposure value	–3.45 stops (aim for –2 to –3)
Exposure spread	0.71 stops
Area used for calculation	0.617 x 0.694
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 3.5 Focal length: 44.4 mm (35 mm equivalent) Exposure compensation: 0
Black at screen edge
Screen photo	[open image]
Luminance	0.24 cd/m2
Luminance spread	0.3 cd/m2 (2 standard deviations)
Exposure value	–3.44 stops (aim for –2 to –3)
Exposure spread	2.06 stops
Area used for calculation	0.617 x 0.694
Camera settings	Exposure time: 1 ISO: 400 F-number: 3.5 Focal length: 44.4 mm (35 mm equivalent) Exposure compensation: 0

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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.