Contrast ratio results

Contrast ratio 10160:1
Monitor model
Submitted 07 Jan 2015 08:11 CET, by 94.78.*.*
Camera model Nikon D5100
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 11.8 s (Set EV to +3.6)
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –6.06 stops   (aim for –2 to –3)
Exposure spread 1.14 stops
Area used for calculation 0.511 x 1
Camera settings Exposure time: 1   ISO: 1000   F-number: 4.5
Focal length: 42 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 264 cd/m2
Luminance spread 36 cd/m2 (2 standard deviations)
Exposure value –0.99 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.359 x 0.473
Camera settings Exposure time: 1/500   ISO: 1000   F-number: 3.5
Focal length: 27 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.