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Contrast ratio results for lc391em3

Contrast ratio 1916:1 (edge: 2234:1)
Monitor model lc391em3
Submitted 15 Jan 2013 08:00 CET, by 173.170.*.*
Camera model Nikon D50
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 8.6 s (Set EV to +3.1)
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 10.0 s (Set EV to +3.3)

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.05 cd/m2 (2 standard deviations)
Exposure value –5.6 stops   (aim for –2 to –3)
Exposure spread 1.49 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 103 cd/m2
Luminance spread 15 cd/m2 (2 standard deviations)
Exposure value –3.34 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –5.82 stops   (aim for –2 to –3)
Exposure spread 2.06 stops
Area used for calculation 0.375 x 0.423
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 27 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.