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

Contrast ratio results

Contrast ratio 461:1 (edge: 497:1)
Monitor model
Submitted 24 Jan 2020 05:23 CET, by 172.74.*.*
Camera model samsung SM-N960U
Processing remarks

Warning: image file 1: Overexposed. Please decrease the shutter time.
Note: image file 1: suggested exposure time: 0.3 s (Set EV to -1.6)
Warning: image file 2: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 0.4 s (Set EV to -1.5)

Black
Screen photo
[open image]
Luminance 0.26 cd/m2
Luminance spread 0.11 cd/m2 (2 standard deviations)
Exposure value –0.88 stops   (aim for –2 to –3)
Exposure spread 0.61 stops
Area used for calculation 0.334 x 0.515
Camera settings Exposure time: 1   ISO: 400   F-number: 1.5
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 120 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –0.49 stops   (aim for –2 to –3)
Exposure spread 0.14 stops
Area used for calculation 0.334 x 0.515
Camera settings Exposure time: 1/350   ISO: 400   F-number: 1.5
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
[open image]
Luminance 0.24 cd/m2
Luminance spread 0.1 cd/m2 (2 standard deviations)
Exposure value –0.99 stops   (aim for –2 to –3)
Exposure spread 0.63 stops
Area used for calculation 0.334 x 0.515
Camera settings Exposure time: 1   ISO: 400   F-number: 1.5
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.