Contrast ratio results

Black
Contrast ratio	1960:1
Monitor model
Submitted	12 Jul 2009 08:24 CEST, by 124.168..
Camera model	CASIO COMPUTER CO.LTD EX-Z50
Processing remarks	image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen. Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 2.0 s (Set EV to +4.0) image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0.13 cd/m2
Luminance spread	0.09 cd/m2 (2 standard deviations)
Exposure value	–6.49 stops (aim for –2 to –3)
Exposure spread	1.05 stops
Area used for calculation	0.506 x 0.506
Camera settings	Exposure time: 1/8 ISO: 400 F-number: 2.6 Focal length: 35 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	252 cd/m2
Luminance spread	33 cd/m2 (2 standard deviations)
Exposure value	–1.65 stops (aim for –2 to –3)
Exposure spread	0.19 stops
Area used for calculation	0.506 x 0.506
Camera settings	Exposure time: 1/200 ISO: 400 F-number: 4.3 Focal length: 35 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.