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Contrast ratio of LG Flatron L1720B

Contrast ratio 174:1
Monitor model LG Flatron L1720B
Submitted 26 Jun 2010 22:46 CEST, by 66.203.*.*
Camera model Canon PowerShot A510
Processing remarks

Note: image file 2: suggested exposure time: 1/94 s (Set EV to +1.1)

Black
Screen photo
[open image]
Luminance 0.55 cd/m2
Luminance spread 0.27 cd/m2 (2 standard deviations)
Exposure value –3.4 stops   (aim for –2 to –3)
Exposure spread 0.72 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1   ISO: 100   F-number: 2.6
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 96 cd/m2
Luminance spread 37 cd/m2 (2 standard deviations)
Exposure value –3.61 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1/202   ISO: 100   F-number: 2.6
Focal length: 34.6 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.