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

Contrast ratio of Dell

Contrast ratio 493:1
Monitor model Dell
Submitted 26 Mar 2020 04:16 CET, by 108.222.*.*
Camera model samsung SM-N950U
Processing remarks

Note: image file 1: suggested exposure time: 0.4 s (Set EV to -1.3)

Black
Screen photo
[open image]
Luminance 0.26 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –1.23 stops   (aim for –2 to –3)
Exposure spread 0.17 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 130 cd/m2
Luminance spread 32 cd/m2 (2 standard deviations)
Exposure value –0.73 stops   (aim for –2 to –3)
Exposure spread 0.36 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/350   ISO: 400   F-number: 1.7
Focal length: 26 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.