| Contrast ratio | 15948:1 |
|---|---|
| Monitor model | |
| Submitted | 20 May 2018 15:35 CEST, by 112.134.*.* |
| Camera model | HUAWEI BLL-L22 |
| Processing remarks | Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
| Black | |
| Screen photo |
|
| Luminance | 36536 cd/m2 |
| Luminance spread | 99974 cd/m2 (2 standard deviations) |
| Exposure value | –14.79 stops (aim for –2 to –3) |
| Exposure spread | 4.25 stops |
| Area used for calculation | 0.915 x 1 |
| Camera settings | Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 69 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 5.82674e+08 cd/m2 |
| Luminance spread | 5.78772e+07 cd/m2 (2 standard deviations) |
| Exposure value | –0.83 stops (aim for –2 to –3) |
| Exposure spread | 0.14 stops |
| Area used for calculation | 0.345 x 0.459 |
| Camera settings | Exposure time: 1/99996336 ISO: 400 F-number: 2.2 Focal length: 26 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr047/11898a.jpg){kind=link}
![[open image]](upload/cr047/11898b.jpg){kind=link}
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.