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

Contrast ratio results

Contrast ratio 1602:1
Monitor model
Submitted 04 Sep 2018 14:55 CEST, by 113.13.*.*
Camera model HUAWEI BLN-AL40
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.
Warning: image file 2: Overexposed. Please decrease the shutter time.

Black
Screen photo
[open image]
Luminance 170326 cd/m2
Luminance spread 83290 cd/m2 (2 standard deviations)
Exposure value –10.92 stops   (aim for –2 to –3)
Exposure spread 0.72 stops
Area used for calculation 0.339 x 0.488
Camera settings Exposure time: 1/99996336   ISO: 1250   F-number: 2.2
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 4
White
Screen photo
[open image]
Luminance 2.72796e+08 cd/m2
Luminance spread 1.90618e+07 cd/m2 (2 standard deviations)
Exposure value –0.28 stops   (aim for –2 to –3)
Exposure spread 0.1 stops
Area used for calculation 0.382 x 0.365
Camera settings Exposure time: 1/99996336   ISO: 1250   F-number: 2.2
Focal length: 26 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.