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

Contrast ratio results

Contrast ratio 872:1
Monitor model
Submitted 22 Dec 2017 00:59 CET, by 89.211.*.*
Camera model samsung SM-G955F
Processing remarks

Note: image file 2: suggested exposure time: 1/310 s (Set EV to -1.3)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 0.31 cd/m2
Luminance spread 0.02 cd/m2 (2 standard deviations)
Exposure value –1.67 stops   (aim for –2 to –3)
Exposure spread 0.08 stops
Area used for calculation 0.376 x 0.375
Camera settings Exposure time: 1   ISO: 250   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 270 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.18 stops   (aim for –2 to –3)
Exposure spread 0.07 stops
Area used for calculation 0.501 x 0.282
Camera settings Exposure time: 1/124   ISO: 50   F-number: 1.7
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.