Contrast ratio results

Contrast ratio 76:1
Monitor model
Submitted 05 Jun 2014 23:00 CEST, by 72.193.*.*
Camera model Canon EOS REBEL T2i
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.3 s (Set EV to +6.8)
Warning: image file 2: camera was zoomed in too much.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 2: Overexposed. Please decrease the shutter time.
Warning: Image ISO settings are not the same.
Warning: Image F-number settings are not the same.

Black
Screen photo
Luminance 0.35 cd/m2
Luminance spread 0.67 cd/m2 (2 standard deviations)
Exposure value –2.25 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 78.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 27 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –9.27 stops   (aim for –2 to –3)
Exposure spread 0.27 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/395   ISO: 100   F-number: 7
Focal length: 78.6 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.