Contrast ratio of HP LP2475w

Contrast ratio 1026:1 (edge: 618:1)
Monitor model HP LP2475w
Submitted 26 Jan 2015 04:17 CET, by 74.193.*.*
Camera model Nikon D50
Processing remarks


Black
Screen photo
Luminance 0.13 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –3.51 stops   (aim for –2 to –3)
Exposure spread 1.42 stops
Area used for calculation 0.722 x 0.814
Camera settings Exposure time: 0.6   ISO: 400   F-number: 2
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 129 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –1.73 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.722 x 0.814
Camera settings Exposure time: 1/500   ISO: 400   F-number: 2
Focal length: 52 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.21 cd/m2
Luminance spread 0.19 cd/m2 (2 standard deviations)
Exposure value –2.36 stops   (aim for –2 to –3)
Exposure spread 1.38 stops
Area used for calculation 0.722 x 0.814
Camera settings Exposure time: 0.8   ISO: 400   F-number: 2
Focal length: 52 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.