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Contrast ratio results for Sony GDM-FW900

Contrast ratio 1038:1
Monitor model Sony GDM-FW900
Submitted 19 Oct 2010 02:11 CEST, by 70.71.*.*
Camera model Canon EOS DIGITAL REBEL XTi
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 10.9 s (Set EV to +3.5)

Black
Screen photo
[open image]
Luminance 0.07 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –5.95 stops   (aim for –2 to –3)
Exposure spread 0.39 stops
Area used for calculation 0.543 x 0.612
Camera settings Exposure time: 1   ISO: 320   F-number: 4
Focal length: 39.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 72 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.57 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.543 x 0.612
Camera settings Exposure time: 1/50   ISO: 320   F-number: 4
Focal length: 39.1 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.