Contrast ratio results

Black
Contrast ratio	44:1
Monitor model
Submitted	22 Nov 2009 11:28 CET, by 91.138..
Camera model	Nikon D300
Processing remarks	Warning: image file 1: automatic white balance can cause inaccuracies. Warning: image file 2: automatic white balance can cause inaccuracies.
Screen photo	[open image]
Luminance	0.68 cd/m2
Luminance spread	0.2 cd/m2 (2 standard deviations)
Exposure value	–2.47 stops (aim for –2 to –3)
Exposure spread	0.43 stops
Area used for calculation	0.721 x 0.815
Camera settings	Exposure time: 1 ISO: 400 F-number: 4.2 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	30 cd/m2
Luminance spread	2 cd/m2 (2 standard deviations)
Exposure value	–1.64 stops (aim for –2 to –3)
Exposure spread	0.1 stops
Area used for calculation	0.721 x 0.815
Camera settings	Exposure time: 1/25 ISO: 400 F-number: 4.2 Focal length: 52 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.