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Contrast ratio results for zr24w

Contrast ratio 1317:1 (edge: 1457:1)
Monitor model zr24w
Submitted 17 Oct 2010 16:00 CEST, by 80.222.*.*
Camera model Canon PowerShot S90
Processing remarks

Note: image file 1: suggested exposure time: 1.3 s (Set EV to +1.1)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Note: image file 3: suggested exposure time: 1.4 s (Set EV to +1.2)

Black
Screen photo
[open image]
Luminance 0.12 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.59 stops   (aim for –2 to –3)
Exposure spread 0.4 stops
Area used for calculation 0.396 x 0.396
Camera settings Exposure time: 0.6   ISO: 400   F-number: 2
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 156 cd/m2
Luminance spread 23 cd/m2 (2 standard deviations)
Exposure value –1.8 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.396 x 0.396
Camera settings Exposure time: 1/636   ISO: 400   F-number: 2
Focal length: 27.4 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.74 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 0.396 x 0.396
Camera settings Exposure time: 0.6   ISO: 400   F-number: 2
Focal length: 27.4 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.