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

Contrast ratio results

Contrast ratio 161:1
Monitor model
Submitted 05 Nov 2018 09:47 CET, by 31.59.*.*
Camera model Canon PowerShot G7 X Mark II
Processing remarks

Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0.61 cd/m2
Luminance spread 0.76 cd/m2 (2 standard deviations)
Exposure value –1.79 stops   (aim for –2 to –3)
Exposure spread 2.14 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 0.8   ISO: 400   F-number: 2.8
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: 7
White
Screen photo
[open image]
Luminance 98 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –2.78 stops   (aim for –2 to –3)
Exposure spread 0.49 stops
Area used for calculation 0.335 x 0.377
Camera settings Exposure time: 1/501   ISO: 400   F-number: 2.5
Focal length: 24.1 mm   (35 mm equivalent)
Exposure compensation: -4

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.