Contrast ratio results for dell inspiron 9700

Contrast ratio 1:1
Monitor model dell inspiron 9700
Submitted 04 Apr 2010 07:53 CEST, by 24.203.*.*
Camera model Canon PowerShot A510
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 0.9 s (Set EV to -2.5)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 2: suggested exposure time: 0.9 s (Set EV to -2.5)
Warning: image file 3: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/230 s (Set EV to -2.5)
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
Luminance 0.29 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –0.02 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 5   ISO: 400   F-number: 2.6
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 0.29 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 5   ISO: 400   F-number: 2.6
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 58 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –0 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1/40   ISO: 400   F-number: 2.6
Focal length: 34.6 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.