Contrast ratio results

Contrast ratio 320:1
Monitor model
Submitted 14 Nov 2012 03:41 CET, by 77.78.*.*
Camera model Olympus SP350
Processing remarks

Note: image file 2: suggested exposure time: 1/270 s (Set EV to -1.1)

Black
Screen photo
Luminance 0.32 cd/m2
Luminance spread 0.26 cd/m2 (2 standard deviations)
Exposure value –2.39 stops   (aim for –2 to –3)
Exposure spread 1.24 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1.3   ISO: 400   F-number: 3.2
Focal length: 38.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 103 cd/m2
Luminance spread 9 cd/m2 (2 standard deviations)
Exposure value –1.41 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1/125   ISO: 400   F-number: 3.2
Focal length: 38.1 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.