Contrast ratio results

Contrast ratio 70325:1
Monitor model
Submitted 06 May 2008 03:06 CEST, by 71.71.*.*
Camera model Minolta DiMAGE Xt
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 279.4 s (Set EV to +14.6)
Note: image file 2: suggested exposure time: 1/250 s (Set EV to -1.5)

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –17.12 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.55 x 0.546
Camera settings Exposure time: 1/90   ISO: 400   F-number: 2.8
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 75 cd/m2
Luminance spread 6 cd/m2 (2 standard deviations)
Exposure value –1.02 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 0.543 x 0.56
Camera settings Exposure time: 1/90   ISO: 400   F-number: 2.8
Focal length: 38 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.