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

Contrast ratio results

Contrast ratio 16:1
Monitor model
Submitted 09 Apr 2018 21:42 CEST, by 86.140.*.*
Camera model HUAWEI CLT-L09
Processing remarks

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

Black
Screen photo
[open image]
Luminance 4.40865e+07 cd/m2
Luminance spread 1.72772e+07 cd/m2 (2 standard deviations)
Exposure value –3.97 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.52 x 0.292
Camera settings Exposure time: 1/99996336   ISO: 400   F-number: 1.8
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
[open image]
Luminance 6.92341e+08 cd/m2
Luminance spread 931595 cd/m2 (2 standard deviations)
Exposure value –0 stops   (aim for –2 to –3)
Exposure spread 0 stops
Area used for calculation 0.52 x 0.292
Camera settings Exposure time: 1/99996336   ISO: 400   F-number: 1.8
Focal length: 27 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.