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Contrast ratio of Samsung 940BW

Contrast ratio 1240:1
Monitor model Samsung 940BW
Submitted 04 Feb 2009 23:18 CET, by 83.142.*.*
Camera model Minolta DiMAGE A1
Processing remarks

Note: image file 2: suggested exposure time: 1/240 s (Set EV to -0.6)

Black
Screen photo
[open image]
Luminance 0.3 cd/m2
Luminance spread 0.07 cd/m2 (2 standard deviations)
Exposure value –2.27 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.766 x 0.766
Camera settings Exposure time: 6   ISO: 100   F-number: 3.2
Focal length: 53 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 374 cd/m2
Luminance spread 31 cd/m2 (2 standard deviations)
Exposure value –0.9 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.766 x 0.766
Camera settings Exposure time: 1/80   ISO: 100   F-number: 3.2
Focal length: 53 mm   (35 mm equivalent)
Exposure compensation: 1

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.