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

Contrast ratio results for Dell

Contrast ratio 1595:1
Monitor model Dell
Submitted 21 Feb 2023 18:31 CET, by 185.115.*.*
Camera model samsung SM-G998B
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.6 s (Set EV to +3.7)

Black
Screen photo
[open image]
Luminance 0.08 cd/m2
Luminance spread 0.03 cd/m2 (2 standard deviations)
Exposure value –4.19 stops   (aim for –2 to –3)
Exposure spread 0.58 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 0.5   ISO: 400   F-number: 1.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 2
White
Screen photo
[open image]
Luminance 121 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –1 stops   (aim for –2 to –3)
Exposure spread 0.24 stops
Area used for calculation 0.347 x 0.347
Camera settings Exposure time: 1/350   ISO: 400   F-number: 1.8
Focal length: 24 mm   (35 mm equivalent)
Exposure compensation: 2

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.