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Contrast ratio of xl2370

Contrast ratio 1068:1
Monitor model xl2370
Submitted 31 Jan 2013 11:47 CET, by 79.55.*.*
Camera model Pentax K-x
Processing remarks

Note: image file 2: suggested exposure time: 1/500 s (Set EV to -1.6)

Black
Screen photo
[open image]
Luminance 0.18 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –2.28 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.417 x 0.469
Camera settings Exposure time: 2.5   ISO: 640   F-number: 4
Focal length: 30 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 188 cd/m2
Luminance spread 10 cd/m2 (2 standard deviations)
Exposure value –0.86 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.417 x 0.469
Camera settings Exposure time: 1/160   ISO: 640   F-number: 4
Focal length: 30 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.