Contrast ratio results

Black
Contrast ratio	1.06376e+06:1
Monitor model
Submitted	26 Oct 2008 22:01 CET, by 62.235..
Camera model	Nikon D100
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 5894.3 s (Set EV to +19.8) Warning: image file 2: Overexposed. Please decrease the shutter time. Note: image file 2: suggested exposure time: 1/280 s (Set EV to -2.5) Warning: Image F-number settings are not the same.
Screen photo	[open image]
Luminance	0 cd/m2
Luminance spread	0 cd/m2 (2 standard deviations)
Exposure value	–22.35 stops (aim for –2 to –3)
Exposure spread	4.25 stops
Area used for calculation	0.722 x 0.814
Camera settings	Exposure time: 1/160 ISO: 400 F-number: 3.5 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	84 cd/m2
Luminance spread	1 cd/m2 (2 standard deviations)
Exposure value	–0 stops (aim for –2 to –3)
Exposure spread	0.02 stops
Area used for calculation	0.722 x 0.814
Camera settings	Exposure time: 1/50 ISO: 400 F-number: 2.8 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.