Contrast ratio results for Sharp AQUOS LC-42D64U

Black
Contrast ratio	1064:1
Monitor model	Sharp AQUOS LC-42D64U
Submitted	11 Feb 2009 03:35 CET, by 24.207..
Camera model	SAMSUNG TECHWIN CO. LTD. Samsung S85
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Note: image file 1: suggested exposure time: 4.0 s (Set EV to +1.0) Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.16 cd/m2
Luminance spread	0.07 cd/m2 (2 standard deviations)
Exposure value	–3.52 stops (aim for –2 to –3)
Exposure spread	0.63 stops
Area used for calculation	0.549 x 0.549
Camera settings	Exposure time: 2 ISO: 200 F-number: 2.9 Focal length: 38 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	167 cd/m2
Luminance spread	27 cd/m2 (2 standard deviations)
Exposure value	–2.43 stops (aim for –2 to –3)
Exposure spread	0.24 stops
Area used for calculation	0.549 x 0.549
Camera settings	Exposure time: 1/250 ISO: 200 F-number: 2.9 Focal length: 38 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.