Contrast ratio results for HP LP2475w

Contrast ratio 475:1
Monitor model HP LP2475w
Submitted 10 Oct 2009 00:12 CEST, by 88.146.*.*
Camera model Panasonic DMC-LX3
Processing remarks

Warning: Image F-number settings are not the same.

Black
Screen photo
Luminance 0.21 cd/m2
Luminance spread 0.09 cd/m2 (2 standard deviations)
Exposure value –2.03 stops   (aim for –2 to –3)
Exposure spread 0.59 stops
Area used for calculation 0.318 x 0.424
Camera settings Exposure time: 1   ISO: 400   F-number: 2
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 99 cd/m2
Luminance spread 8 cd/m2 (2 standard deviations)
Exposure value –2.06 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.318 x 0.424
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.2
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.