Contrast ratio results for Westinghouse TXF-47F430S

Black
Contrast ratio	1092:1
Monitor model	Westinghouse TXF-47F430S
Submitted	18 Dec 2013 06:15 CET, by 165.166..
Camera model	Kodak EASYSHARE C143 Digital Camera
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 5.7 s (Set EV to +5.5) Note: image file 2: suggested exposure time: 1/190 s (Set EV to -1.6)
Screen photo	[open image]
Luminance	0.06 cd/m2
Luminance spread	0.02 cd/m2 (2 standard deviations)
Exposure value	–8 stops (aim for –2 to –3)
Exposure spread	0.58 stops
Area used for calculation	0.462 x 0.462
Camera settings	Exposure time: 1/8 ISO: 400 F-number: 2.9 Focal length: 32 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	61 cd/m2
Luminance spread	5 cd/m2 (2 standard deviations)
Exposure value	–0.9 stops (aim for –2 to –3)
Exposure spread	0.13 stops
Area used for calculation	0.462 x 0.462
Camera settings	Exposure time: 1/64 ISO: 400 F-number: 2.9 Focal length: 32 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.