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Contrast ratio of HP Z24i LG LM240WU8

Contrast ratio 1622:1
Monitor model HP Z24i LG LM240WU8
Submitted 08 Jul 2014 21:59 CEST, by 176.98.*.*
Camera model Canon PowerShot SX200 IS
Processing remarks


Black
Screen photo
[open image]
Luminance 0.04 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.46 stops   (aim for –2 to –3)
Exposure spread 0.9 stops
Area used for calculation 0.394 x 0.394
Camera settings Exposure time: 5   ISO: 400   F-number: 3.4
Focal length: 27.3 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 73 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –2.43 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.394 x 0.394
Camera settings Exposure time: 1/159   ISO: 400   F-number: 3.4
Focal length: 27.3 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.