Contrast ratio results for Lenovo

Contrast ratio 27726:1
Monitor model Lenovo
Submitted 07 Oct 2013 16:34 CEST, by 201.23.*.*
Camera model Samsung Techwin KENOX S760 / Samsung S7
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 66.4 s (Set EV to +14.6)

Black
Screen photo
Luminance 0 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –17.05 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/362   ISO: 400   F-number: 2.8
Focal length: 38 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 124 cd/m2
Luminance spread 39 cd/m2 (2 standard deviations)
Exposure value –2.17 stops   (aim for –2 to –3)
Exposure spread 0.46 stops
Area used for calculation 0.549 x 0.549
Camera settings Exposure time: 1/333   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.