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

Contrast ratio results for Samsung C24F390 (max bright)

Contrast ratio 1195:1 (edge: 1069:1)
Monitor model Samsung C24F390 (max bright)
Submitted 10 Apr 2018 03:01 CEST, by 90.94.*.*
Camera model samsung SM-G930F
Processing remarks

Note: image file 1: suggested exposure time: 0.5 s (Set EV to -1.0)
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Note: image file 3: suggested exposure time: 0.4 s (Set EV to -1.2)

Black
Screen photo
[open image]
Luminance 0.22 cd/m2
Luminance spread 0.12 cd/m2 (2 standard deviations)
Exposure value –1.46 stops   (aim for –2 to –3)
Exposure spread 0.78 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 268 cd/m2
Luminance spread 29 cd/m2 (2 standard deviations)
Exposure value –0.79 stops   (aim for –2 to –3)
Exposure spread 0.16 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/750   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 0.25 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –1.3 stops   (aim for –2 to –3)
Exposure spread 0.65 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.