Contrast ratio results

Contrast ratio 7626:1
Monitor model
Submitted 03 Dec 2008 18:43 CET, by 82.235.*.*
Camera model Olympus C-5000Z
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 11.6 s (Set EV to +1.5)
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image F-number settings are not the same.

Black
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –6.04 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1   ISO: 320   F-number: 2.8
Focal length: 38.1 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
Luminance 243 cd/m2
Luminance spread 336 cd/m2 (2 standard deviations)
Exposure value –2.26 stops   (aim for –2 to –3)
Exposure spread 2.47 stops
Area used for calculation 0.55 x 0.55
Camera settings Exposure time: 1/453   ISO: 320   F-number: 3.1
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.