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

Contrast ratio of Dell U4320Q

Contrast ratio 593:1
Monitor model Dell U4320Q
Submitted 18 Apr 2020 00:39 CEST, by 82.136.*.*
Camera model Panasonic DMC-GX80
Processing remarks

Note: image file 1: suggested exposure time: 4.3 s (Set EV to +1.1)

Black
Screen photo
[open image]
Luminance 0.14 cd/m2
Luminance spread 0.04 cd/m2 (2 standard deviations)
Exposure value –3.61 stops   (aim for –2 to –3)
Exposure spread 0.47 stops
Area used for calculation 0.347 x 0.346
Camera settings Exposure time: 2   ISO: 200   F-number: 2.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 81 cd/m2
Luminance spread 17 cd/m2 (2 standard deviations)
Exposure value –1.72 stops   (aim for –2 to –3)
Exposure spread 0.29 stops
Area used for calculation 0.347 x 0.346
Camera settings Exposure time: 1/80   ISO: 200   F-number: 2.8
Focal length: 24 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.