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

Contrast ratio results

Contrast ratio 39961:1
Monitor model
Submitted 26 Apr 2018 19:05 CEST, by 213.233.*.*
Camera model HUAWEI WAS-LX1
Processing remarks

Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.
Warning: image file 1: Underexposed. Please increase the shutter time.
Warning: image file 2: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation.

Black
Screen photo
[open image]
Luminance 17468 cd/m2
Luminance spread 17769 cd/m2 (2 standard deviations)
Exposure value –15.85 stops   (aim for –2 to –3)
Exposure spread 1.62 stops
Area used for calculation 0.612 x 0.259
Camera settings Exposure time: 1/99996336   ISO: 400   F-number: 2.2
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -1.3
White
Screen photo
[open image]
Luminance 6.9805e+08 cd/m2
Luminance spread 9.28061e+06 cd/m2 (2 standard deviations)
Exposure value –0.57 stops   (aim for –2 to –3)
Exposure spread 0.02 stops
Area used for calculation 0.612 x 0.259
Camera settings Exposure time: 1/99996336   ISO: 400   F-number: 2.2
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: -1.3

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.