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

Contrast ratio results

Contrast ratio 1471:1
Monitor model
Submitted 29 Mar 2024 16:51 CET, by 161.53.*.*
Camera model samsung SM-G780F
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 1.2 s (Set EV to +1.6)
Warning: image file 2: automatic white balance can cause inaccuracies.

Black
Screen photo
[open image]
Luminance 0.1 cd/m2
Luminance spread 0.06 cd/m2 (2 standard deviations)
Exposure value –4.79 stops   (aim for –2 to –3)
Exposure spread 0.83 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/4   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -0.7
White
Screen photo
[open image]
Luminance 147 cd/m2
Luminance spread 20 cd/m2 (2 standard deviations)
Exposure value –0.72 stops   (aim for –2 to –3)
Exposure spread 0.19 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1/350   ISO: 400   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -0.7

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.