Contrast ratio results

Contrast ratio 248:1
Monitor model
Submitted 22 Sep 2015 13:14 CEST, by 60.241.*.*
Camera model Nikon D7000
Processing remarks

Note: image file 1: suggested exposure time: 4.7 s (Set EV to +1.2)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/52 s (Set EV to +1.9)

Black
Screen photo
Luminance 0.06 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.74 stops   (aim for –2 to –3)
Exposure spread 0.79 stops
Area used for calculation 0.721 x 0.816
Camera settings Exposure time: 2   ISO: 400   F-number: 2.8
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 16 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –4.43 stops   (aim for –2 to –3)
Exposure spread 1.17 stops
Area used for calculation 0.721 x 0.816
Camera settings Exposure time: 1/200   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.