Contrast ratio results

Black
Contrast ratio	9482:1
Monitor model
Submitted	17 Feb 2013 04:10 CET, by 108.34..
Camera model	Nikon D700
Processing remarks	Warning: image file 1: Underexposed. Please increase the shutter time. Note: image file 1: suggested exposure time: 11.7 s (Set EV to +4.3) Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Screen photo	[open image]
Luminance	0.01 cd/m2
Luminance spread	0.01 cd/m2 (2 standard deviations)
Exposure value	–6.79 stops (aim for –2 to –3)
Exposure spread	2.59 stops
Area used for calculation	0.722 x 0.813
Camera settings	Exposure time: 0.6 ISO: 4000 F-number: 4.2 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0
White
Screen photo	[open image]
Luminance	54 cd/m2
Luminance spread	60 cd/m2 (2 standard deviations)
Exposure value	–2.16 stops (aim for –2 to –3)
Exposure spread	1.8 stops
Area used for calculation	0.722 x 0.813
Camera settings	Exposure time: 1/640 ISO: 4000 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.