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

Contrast ratio results

Contrast ratio 283:1
Monitor model
Submitted 25 Feb 2018 15:07 CET, by 105.209.*.*
Camera model Panasonic DC-GH5
Processing remarks

image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image F-number settings are not the same.

Black
Screen photo
[open image]
Luminance 0.39 cd/m2
Luminance spread 0.38 cd/m2 (2 standard deviations)
Exposure value –3.43 stops   (aim for –2 to –3)
Exposure spread 1.54 stops
Area used for calculation 0.964 x 0.723
Camera settings Exposure time: 1/6   ISO: 400   F-number: 1.8
Focal length: 59 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 109 cd/m2
Luminance spread 33 cd/m2 (2 standard deviations)
Exposure value –0.85 stops   (aim for –2 to –3)
Exposure spread 0.44 stops
Area used for calculation 0.964 x 0.723
Camera settings Exposure time: 1/320   ISO: 400   F-number: 1.7
Focal length: 59 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.