Contrast ratio results

Black
Contrast ratio	374:1
Monitor model
Submitted	30 Apr 2009 02:50 CEST, by 146.201..
Camera model	Sony DSC-W1
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 2: automatic white balance can cause inaccuracies. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. Note: image file 2: suggested exposure time: 1/180 s (Set EV to +1.2)
Screen photo	[open image]
Luminance	0.14 cd/m2
Luminance spread	0.04 cd/m2 (2 standard deviations)
Exposure value	–2.27 stops (aim for –2 to –3)
Exposure spread	0.47 stops
Area used for calculation	0.552 x 0.552
Camera settings	Exposure time: 2.5 ISO: 400 F-number: 2.8 Focal length: 38.2 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	52 cd/m2
Luminance spread	12 cd/m2 (2 standard deviations)
Exposure value	–3.69 stops (aim for –2 to –3)
Exposure spread	0.32 stops
Area used for calculation	0.552 x 0.552
Camera settings	Exposure time: 1/400 ISO: 400 F-number: 2.8 Focal length: 38.2 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.