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Contrast ratio results for ips225

Contrast ratio 1539:1
Monitor model ips225
Submitted 12 Feb 2012 22:43 CET, by 125.166.*.*
Camera model Sony NEX-5
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 6.3 s (Set EV to +1.7)
Note: image file 2: suggested exposure time: 1/240 s (Set EV to -1.3)

Black
Screen photo
[open image]
Luminance 0.19 cd/m2
Luminance spread 0.2 cd/m2 (2 standard deviations)
Exposure value –4.17 stops   (aim for –2 to –3)
Exposure spread 1.74 stops
Area used for calculation 0.458 x 0.516
Camera settings Exposure time: 2   ISO: 400   F-number: 5.6
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 287 cd/m2
Luminance spread 40 cd/m2 (2 standard deviations)
Exposure value –1.22 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.458 x 0.516
Camera settings Exposure time: 1/100   ISO: 400   F-number: 5.6
Focal length: 33 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.