Contrast ratio results for Samsung LN46A950

Contrast ratio 157817:1 (edge: 136363:1)
Monitor model Samsung LN46A950
Submitted 21 Jun 2009 19:12 CEST, by 70.70.*.*
Camera model Canon PowerShot A75
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: 89.4 s (Set EV to +4.5)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 77.3 s (Set EV to +4.3)

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –8.98 stops   (aim for –2 to –3)
Exposure spread 1.95 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: -2
White
Screen photo
Luminance 523 cd/m2
Luminance spread 64 cd/m2 (2 standard deviations)
Exposure value –2 stops   (aim for –2 to –3)
Exposure spread 0.18 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1/1244   ISO: 400   F-number: 2.8
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: -2
Black at screen edge
Screen photo
Luminance 0 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –8.77 stops   (aim for –2 to –3)
Exposure spread 1.9 stops
Area used for calculation 0.5 x 0.5
Camera settings Exposure time: 1   ISO: 400   F-number: 2.8
Focal length: 34.6 mm   (35 mm equivalent)
Exposure compensation: -2

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.