Contrast ratio results

Contrast ratio 25:1
Monitor model
Submitted 06 Aug 2010 16:45 CEST, by 149.5.*.*
Camera model Nikon D700
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1/12 s (Set EV to +6.3)
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 1/310 s (Set EV to +1.6)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
Luminance 7 cd/m2
Luminance spread 50 cd/m2 (2 standard deviations)
Exposure value –4.79 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.333 x 0.375
Camera settings Exposure time: 1/60   ISO: 200   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 4
White
Screen photo
Luminance 182 cd/m2
Luminance spread 109 cd/m2 (2 standard deviations)
Exposure value –0.14 stops   (aim for –2 to –3)
Exposure spread 0.89 stops
Area used for calculation 0.403 x 0.454
Camera settings Exposure time: 1/60   ISO: 200   F-number: 2.8
Focal length: 29 mm   (35 mm equivalent)
Exposure compensation: 4

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.