Contrast ratio | Test results | LCD test | Small-screen tests | Lagom home

Contrast ratio results for Dell U2913WM calibrated with x-rite

Contrast ratio 572:1 (edge: 335:1)
Monitor model Dell U2913WM calibrated with x-rite
Submitted 16 Sep 2014 00:28 CEST, by 90.198.*.*
Camera model Fujifilm X-Pro1
Processing remarks

Warning: image file 3: camera was zoomed in too much.
Warning: Image F-number settings are not the same.
Warning: Image focal lengths/zoom levels are not the same.

Black
Screen photo
[open image]
Luminance 0.2 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –2.1 stops   (aim for –2 to –3)
Exposure spread 0.15 stops
Area used for calculation 0.866 x 0.65
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.4
Focal length: 53 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 112 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –0.94 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.866 x 0.65
Camera settings Exposure time: 1/512   ISO: 400   F-number: 1.4
Focal length: 53 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.33 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.89 stops   (aim for –2 to –3)
Exposure spread 0.13 stops
Area used for calculation 1 x 0.75
Camera settings Exposure time: 1   ISO: 400   F-number: 2.4
Focal length: 90 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.