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Contrast ratio results for topaz 24

Contrast ratio 982:1
Monitor model topaz 24
Submitted 08 Jan 2009 23:55 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: 4.1 s (Set EV to +5.0)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/240 s (Set EV to -0.2)

Black
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –5.53 stops   (aim for –2 to –3)
Exposure spread 1.11 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 0.5   ISO: 200   F-number: 2.7
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 132 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –0.32 stops   (aim for –2 to –3)
Exposure spread 0.06 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/53   ISO: 200   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.