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Contrast ratio of Dell U2715

Contrast ratio 870:1
Monitor model Dell U2715
Submitted 14 Dec 2015 21:16 CET, by 67.169.*.*
Camera model SAMSUNG NX30
Processing remarks

Note: image file 1: suggested exposure time: 2.7 s (Set EV to +1.4)

Black
Screen photo
[open image]
Luminance 0.17 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.58 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.441 x 0.331
Camera settings Exposure time: 1.3   ISO: 400   F-number: 3.5
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0.3
White
Screen photo
[open image]
Luminance 147 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –2.84 stops   (aim for –2 to –3)
Exposure spread 0.12 stops
Area used for calculation 0.441 x 0.331
Camera settings Exposure time: 1/400   ISO: 400   F-number: 3.5
Focal length: 27 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.