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Contrast ratio of Samsung LTN156AT05-401

Contrast ratio 189:1
Monitor model Samsung LTN156AT05-401
Submitted 19 Aug 2010 05:37 CEST, by 69.196.*.*
Camera model Canon PowerShot S5 IS
Processing remarks


Black
Screen photo
[open image]
Luminance 0.99 cd/m2
Luminance spread 1.89 cd/m2 (2 standard deviations)
Exposure value –2.65 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.7
Focal length: 35.5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 188 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –1.74 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.513 x 0.513
Camera settings Exposure time: 1/403   ISO: 400   F-number: 2.7
Focal length: 35.5 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.