Contrast ratio of Dell U2717D

Contrast ratio 1273:1 (edge: 1385:1)
Monitor model Dell U2717D
Submitted 30 May 2017 22:38 CEST, by 46.29.*.*
Camera model Canon PowerShot SX260 HS
Processing remarks

Note: image file 3: suggested exposure time: 1.9 s (Set EV to +1.3)

Black
Screen photo
Luminance 0.26 cd/m2
Luminance spread 0.14 cd/m2 (2 standard deviations)
Exposure value –3.33 stops   (aim for –2 to –3)
Exposure spread 0.8 stops
Area used for calculation 0.363 x 0.363
Camera settings Exposure time: 1   ISO: 400   F-number: 3.5
Focal length: 25.1 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 331 cd/m2
Luminance spread 18 cd/m2 (2 standard deviations)
Exposure value –1.67 stops   (aim for –2 to –3)
Exposure spread 0.08 stops
Area used for calculation 0.363 x 0.363
Camera settings Exposure time: 1/403   ISO: 400   F-number: 3.5
Focal length: 25.1 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.24 cd/m2
Luminance spread 0.22 cd/m2 (2 standard deviations)
Exposure value –3.78 stops   (aim for –2 to –3)
Exposure spread 1.43 stops
Area used for calculation 0.363 x 0.363
Camera settings Exposure time: 0.8   ISO: 400   F-number: 3.5
Focal length: 25.1 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.