Contrast ratio results

Black
Contrast ratio	233:1
Monitor model
Submitted	05 Nov 2012 22:12 CET, by 77.78..
Camera model	Olympus SP350
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 1: suggested exposure time: 0.5 s (Set EV to -1.6) Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.56 cd/m2
Luminance spread	0.1 cd/m2 (2 standard deviations)
Exposure value	–0.9 stops (aim for –2 to –3)
Exposure spread	0.25 stops
Area used for calculation	0.529 x 0.595
Camera settings	Exposure time: 1.6 ISO: 400 F-number: 2.8 Focal length: 38.1 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	131 cd/m2
Luminance spread	14 cd/m2 (2 standard deviations)
Exposure value	–2.03 stops (aim for –2 to –3)
Exposure spread	0.16 stops
Area used for calculation	0.529 x 0.595
Camera settings	Exposure time: 1/320 ISO: 400 F-number: 2.8 Focal length: 38.1 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.