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

Contrast ratio results

Contrast ratio 66:1
Monitor model
Submitted 16 Sep 2021 13:19 CEST, by 68.206.*.*
Camera model samsung SM-G991U
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 0.3 s (Set EV to -1.8)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.05 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.59 stops   (aim for –2 to –3)
Exposure spread 0.32 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 0.9   ISO: 1000   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 3.36 cd/m2
Luminance spread 0.65 cd/m2 (2 standard deviations)
Exposure value –0.72 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.376 x 0.376
Camera settings Exposure time: 1   ISO: 50   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
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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.