Contrast ratio results

Contrast ratio 6:1
Monitor model
Submitted 07 Dec 2013 22:52 CET, by 37.110.*.*
Camera model Minolta DiMAGE A1
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.7 s (Set EV to +5.2)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 0.5 s (Set EV to -0.2)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.4 cd/m2
Luminance spread 0.49 cd/m2 (2 standard deviations)
Exposure value –7.7 stops   (aim for –2 to –3)
Exposure spread 2.03 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 1/50   ISO: 400   F-number: 2.8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 2.25 cd/m2
Luminance spread 0.52 cd/m2 (2 standard deviations)
Exposure value –0.25 stops   (aim for –2 to –3)
Exposure spread 0.34 stops
Area used for calculation 0.404 x 0.404
Camera settings Exposure time: 2.5   ISO: 100   F-number: 2.8
Focal length: 28 mm   (35 mm equivalent)
Exposure compensation: 2

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.