Contrast ratio results

Contrast ratio 5942:1
Monitor model
Submitted 07 Mar 2015 16:53 CET, by 142.162.*.*
Camera model Canon EOS REBEL T3
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 50.6 s (Set EV to +7.7)
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/120 s (Set EV to +1.8)
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –10.16 stops   (aim for –2 to –3)
Exposure spread 0.65 stops
Area used for calculation 0.611 x 0.687
Camera settings Exposure time: 1/4   ISO: 400   F-number: 4
Focal length: 44 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 71 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –4.25 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.59 x 0.664
Camera settings Exposure time: 1/395   ISO: 400   F-number: 4
Focal length: 42.5 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.