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Contrast ratio results for Chimei

Contrast ratio 230:1
Monitor model Chimei
Submitted 28 Jan 2012 12:16 CET, by 76.168.*.*
Camera model Canon DIGITAL IXUS 960 IS
Processing remarks

Note: image file 2: suggested exposure time: 0.3 s (Set EV to -1.6)
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.89 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –0.91 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.508 x 0.508
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 35.2 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 205 cd/m2
Luminance spread 31 cd/m2 (2 standard deviations)
Exposure value –2.03 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.508 x 0.508
Camera settings Exposure time: 1/501   ISO: 400   F-number: 2.8
Focal length: 35.2 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 210 cd/m2
Luminance spread 35 cd/m2 (2 standard deviations)
Exposure value –2 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.508 x 0.508
Camera settings Exposure time: 1/501   ISO: 400   F-number: 2.8
Focal length: 35.2 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.