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Contrast ratio results for acer

Contrast ratio 8354:1
Monitor model acer
Submitted 09 Jan 2014 18:31 CET, by 86.126.*.*
Camera model Canon EOS 550D
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 16.1 s (Set EV to +6.0)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.

Black
Screen photo
[open image]
Luminance 0.03 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –8.5 stops   (aim for –2 to –3)
Exposure spread 0.35 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.5
Focal length: 28.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 241 cd/m2
Luminance spread 77 cd/m2 (2 standard deviations)
Exposure value –1.48 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 0.393 x 0.442
Camera settings Exposure time: 1/256   ISO: 400   F-number: 3.5
Focal length: 28.3 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.