| Contrast ratio | 17538:1 |
|---|---|
| Monitor model | |
| Submitted | 07 Apr 2017 10:19 CEST, by 187.147.*.* |
| Camera model | samsung SM-J700M |
| Processing remarks | Warning: image file 1: Underexposed. Please increase the shutter time. |
| Black | |
| Screen photo |
|
| Luminance | 0.01 cd/m2 |
| Luminance spread | 0.01 cd/m2 (2 standard deviations) |
| Exposure value | –10.41 stops (aim for –2 to –3) |
| Exposure spread | 0.97 stops |
| Area used for calculation | 0.371 x 0.495 |
| Camera settings | Exposure time: 1/17 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 2 |
| White | |
| Screen photo |
|
| Luminance | 169 cd/m2 |
| Luminance spread | 5 cd/m2 (2 standard deviations) |
| Exposure value | –0.26 stops (aim for –2 to –3) |
| Exposure spread | 0.04 stops |
| Area used for calculation | 0.371 x 0.495 |
| Camera settings | Exposure time: 1/263 ISO: 400 F-number: 1.9 Focal length: 28 mm (35 mm equivalent) Exposure compensation: 2 |
![[open image]](upload/cr042/10684a.jpg){kind=link}
![[open image]](upload/cr042/10684b.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.