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Contrast ratio of HP LP2275w

Contrast ratio 1596:1
Monitor model HP LP2275w
Submitted 13 Apr 2009 13:30 CEST, by 195.178.*.*
Camera model Panasonic DMC-FZ50
Processing remarks

Note: image file 1: suggested exposure time: 2.1 s (Set EV to +1.1)

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –3.59 stops   (aim for –2 to –3)
Exposure spread 0.31 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 35 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 222 cd/m2
Luminance spread 13 cd/m2 (2 standard deviations)
Exposure value –1.59 stops   (aim for –2 to –3)
Exposure spread 0.08 stops
Area used for calculation 0.506 x 0.506
Camera settings Exposure time: 1/400   ISO: 400   F-number: 2.8
Focal length: 35 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.