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

Contrast ratio results

Contrast ratio 116:1
Monitor model
Submitted 03 Nov 2020 18:35 CET, by 84.9.*.*
Camera model Apple iPhone 11
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: 1/330 s (Set EV to -1.9)
Warning: Image ISO settings are not the same.

Black
Screen photo
[open image]
Luminance 2.78 cd/m2
Luminance spread 3.32 cd/m2 (2 standard deviations)
Exposure value –1.9 stops   (aim for –2 to –3)
Exposure spread 1.99 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/30   ISO: 800   F-number: 1.8
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 322 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –0.63 stops   (aim for –2 to –3)
Exposure spread 0.21 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/90   ISO: 50   F-number: 1.8
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.