Contrast ratio results for Lenovo T61p Panel

Contrast ratio 520:1
Monitor model Lenovo T61p Panel
Submitted 10 Dec 2010 05:06 CET, by 128.113.*.*
Camera model Canon EOS DIGITAL REBEL XSi
Processing remarks

Warning: image file 1: camera was zoomed in too much.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 8.3 s (Set EV to +2.0)
Warning: image file 2: camera was zoomed in too much.
Warning: image file 2: Underexposed. Please increase the shutter time.
Note: image file 2: suggested exposure time: 1/63 s (Set EV to +2.0)

Black
Screen photo
Luminance 0.11 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –4.55 stops   (aim for –2 to –3)
Exposure spread 1.07 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 2   ISO: 400   F-number: 5
Focal length: 345 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 59 cd/m2
Luminance spread 39 cd/m2 (2 standard deviations)
Exposure value –4.49 stops   (aim for –2 to –3)
Exposure spread 0.98 stops
Area used for calculation 1 x 1
Camera settings Exposure time: 1/250   ISO: 400   F-number: 5
Focal length: 345 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.