Contrast ratio results

Black
Contrast ratio	26:1
Monitor model
Submitted	02 Sep 2009 18:08 CEST, by 188.134..
Camera model	Kodak Z730 ZOOM DIGITAL CAMERA
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 0.9 s (Set EV to +5.9) Warning: image file 2: camera was zoomed in too much. Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/350 s (Set EV to -0.9) Warning: Image ISO settings are not the same. Warning: Image F-number settings are not the same. Warning: Images were taken with different cameras. Warning: Image focal lengths/zoom levels are not the same.
Screen photo	[open image]
Luminance	82 cd/m2
Luminance spread	837 cd/m2 (2 standard deviations)
Exposure value	–8.42 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.916 x 1
Camera settings	Exposure time: 1/64 ISO: 100 F-number: 22.6 Focal length: 67.2 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	2126 cd/m2
Luminance spread	1379 cd/m2 (2 standard deviations)
Exposure value	–0.57 stops (aim for –2 to –3)
Exposure spread	0.97 stops
Area used for calculation	1 x 1
Camera settings	Exposure time: 1/91 ISO: 80 F-number: 5.7 Focal length: 89 mm (35 mm equivalent) Exposure compensation: 1

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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.