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Contrast ratio of acer AL1511

Contrast ratio 433:1
Monitor model acer AL1511
Submitted 14 May 2011 12:45 CEST, by 98.157.*.*
Camera model Kodak Z1285 ZOOM DIGITAL CAMERA
Processing remarks

Note: image file 2: suggested exposure time: 1/340 s (Set EV to -1.1)

Black
Screen photo
[open image]
Luminance 0.24 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –2.45 stops   (aim for –2 to –3)
Exposure spread 0.76 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1.3   ISO: 400   F-number: 2.8
Focal length: 36 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 102 cd/m2
Luminance spread 26 cd/m2 (2 standard deviations)
Exposure value –1.4 stops   (aim for –2 to –3)
Exposure spread 0.38 stops
Area used for calculation 0.52 x 0.52
Camera settings Exposure time: 1/161   ISO: 400   F-number: 2.8
Focal length: 36 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.