Contrast ratio of Acer

Contrast ratio 604:1
Monitor model Acer
Submitted 17 Feb 2014 00:00 CET, by 216.186.*.*
Camera model Canon PowerShot SD1100 IS
Processing remarks


Black
Screen photo
Luminance 0.12 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –1.75 stops   (aim for –2 to –3)
Exposure spread 0.51 stops
Area used for calculation 0.53 x 0.53
Camera settings Exposure time: 4   ISO: 400   F-number: 2.8
Focal length: 36.7 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 75 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –3.17 stops   (aim for –2 to –3)
Exposure spread 0.25 stops
Area used for calculation 0.53 x 0.53
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.8
Focal length: 36.7 mm   (35 mm equivalent)
Exposure compensation: -1

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.