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

Contrast ratio of C24F390 (max bright, 75% contr)

Contrast ratio 1420:1 (edge: 1278:1)
Monitor model C24F390 (max bright, 75% contr)
Submitted 10 Apr 2018 04:24 CEST, by 90.94.*.*
Camera model samsung SM-G930F
Processing remarks


Black
Screen photo
[open image]
Luminance 0.11 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –2.43 stops   (aim for –2 to –3)
Exposure spread 1.39 stops
Area used for calculation 0.345 x 0.46
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 163 cd/m2
Luminance spread 22 cd/m2 (2 standard deviations)
Exposure value –0.91 stops   (aim for –2 to –3)
Exposure spread 0.2 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/498   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.13 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –2.27 stops   (aim for –2 to –3)
Exposure spread 0.95 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1   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.