Contrast ratio of Viewsonic VA243wm

Contrast ratio 676:1
Monitor model Viewsonic VA243wm
Submitted 28 Aug 2012 05:25 CEST, by 71.20.*.*
Camera model Pentax K-5
Processing remarks

Note: image file 1: suggested exposure time: 3.9 s (Set EV to -1.3)

Black
Screen photo
Luminance 0.12 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.15 stops   (aim for –2 to –3)
Exposure spread 0.41 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 10   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 80 cd/m2
Luminance spread 37 cd/m2 (2 standard deviations)
Exposure value –2.39 stops   (aim for –2 to –3)
Exposure spread 0.68 stops
Area used for calculation 0.375 x 0.422
Camera settings Exposure time: 1/160   ISO: 400   F-number: 3.5
Focal length: 27 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.