| Contrast ratio | 17:1 |
|---|---|
| Monitor model | Acer |
| Submitted | 21 Feb 2018 01:49 CET, by 161.0.*.* |
| Camera model | samsung SM-J500M |
| Processing remarks |
|
| Black | |
| Screen photo |
|
| Luminance | 6 cd/m2 |
| Luminance spread | 3 cd/m2 (2 standard deviations) |
| Exposure value | –2.07 stops (aim for –2 to –3) |
| Exposure spread | 0.79 stops |
| Area used for calculation | 0.371 x 0.495 |
| Camera settings | Exposure time: 1/30 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 1 |
| White | |
| Screen photo |
|
| Luminance | 95 cd/m2 |
| Luminance spread | 37 cd/m2 (2 standard deviations) |
| Exposure value | –2.01 stops (aim for –2 to –3) |
| Exposure spread | 0.57 stops |
| Area used for calculation | 0.371 x 0.495 |
| Camera settings | Exposure time: 1/495 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 0.3 |
![[open image]](upload/cr046/11702a.jpg){kind=link}
![[open image]](upload/cr046/11702b.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.