Contrast ratio results

Black
Contrast ratio	17:1
Monitor model
Submitted	14 Mar 2010 10:19 CET, by 94.138..
Camera model	Nikon COOLPIX P50
Processing remarks	image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Screen photo	[open image]
Luminance	2.97 cd/m2
Luminance spread	1.96 cd/m2 (2 standard deviations)
Exposure value	–2.82 stops (aim for –2 to –3)
Exposure spread	0.99 stops
Area used for calculation	0.65 x 0.65
Camera settings	Exposure time: 0.5 ISO: 100 F-number: 3.5 Focal length: 45 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	50 cd/m2
Luminance spread	36 cd/m2 (2 standard deviations)
Exposure value	–2.65 stops (aim for –2 to –3)
Exposure spread	1.1 stops
Area used for calculation	0.65 x 0.65
Camera settings	Exposure time: 1/30 ISO: 100 F-number: 3.5 Focal length: 45 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.