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Contrast ratio results for Philips 220CW

Contrast ratio 2917:1
Monitor model Philips 220CW
Submitted 18 Feb 2015 20:44 CET, by 84.25.*.*
Camera model SAMSUNG SM-C115
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 8.6 s (Set EV to +5.1)

Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –7.6 stops   (aim for –2 to –3)
Exposure spread 0.52 stops
Area used for calculation 0.318 x 0.424
Camera settings Exposure time: 1/4   ISO: 400   F-number: 3.1
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 124 cd/m2
Luminance spread 44 cd/m2 (2 standard deviations)
Exposure value –2.59 stops   (aim for –2 to –3)
Exposure spread 0.52 stops
Area used for calculation 0.318 x 0.424
Camera settings Exposure time: 1/362   ISO: 400   F-number: 3.1
Focal length: 24 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.