Contrast ratio results

Black
Contrast ratio	368189:1
Monitor model
Submitted	13 Jun 2008 22:43 CEST, by 190.51..
Camera model	Kodak EASYSHARE C613 ZOOM DIGITAL CAMERA
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 3051.8 s (Set EV to +14.6) Warning: image file 2: automatic white balance can cause inaccuracies. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/120 s (Set EV to -0.2)
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–17.08 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	166 cd/m2
Luminance spread	14 cd/m2 (2 standard deviations)
Exposure value	–0.34 stops (aim for –2 to –3)
Exposure spread	0.12 stops
Area used for calculation	0.52 x 0.52
Camera settings	Exposure time: 1/27 ISO: 80 F-number: 2.7 Focal length: 36 mm (35 mm equivalent) Exposure compensation: 2

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.