Contrast ratio results for Soyo Topaz 24"

Black
Contrast ratio	145761:1
Monitor model	Soyo Topaz 24"
Submitted	08 Jan 2009 23:42 CET, by 75.84..
Camera model	Kodak EASYSHARE C613 ZOOM DIGITAL CAMERA
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 1273.1 s (Set EV to +13.3) Note: image file 2: suggested exposure time: 1/110 s (Set EV to -1.3)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–15.81 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1/8 ISO: 80 F-number: 2.7 Focal length: 36 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	158 cd/m2
Luminance spread	13 cd/m2 (2 standard deviations)
Exposure value	–1.25 stops (aim for –2 to –3)
Exposure spread	0.12 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1/48 ISO: 80 F-number: 2.7 Focal length: 36 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.