| Contrast ratio | 707:1 |
|---|---|
| Monitor model | Nokia Lumia 620 Medium Brightness |
| Submitted | 14 Aug 2014 04:00 CEST, by 178.143.*.* |
| Camera model | Canon EOS 350D DIGITAL |
| Processing remarks | Warning: Image focal lengths/zoom levels are not the same. |
| Black | |
| Screen photo |
|
| Luminance | 0.29 cd/m2 |
| Luminance spread | 0.06 cd/m2 (2 standard deviations) |
| Exposure value | –1.97 stops (aim for –2 to –3) |
| Exposure spread | 0.32 stops |
| Area used for calculation | 0.543 x 0.611 |
| Camera settings | Exposure time: 6 ISO: 200 F-number: 4 Focal length: 39.1 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 205 cd/m2 |
| Luminance spread | 105 cd/m2 (2 standard deviations) |
| Exposure value | –2.06 stops (aim for –2 to –3) |
| Exposure spread | 0.75 stops |
| Area used for calculation | 0.651 x 0.733 |
| Camera settings | Exposure time: 1/125 ISO: 200 F-number: 4 Focal length: 46.9 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr032/08029a.jpg){kind=link}
![[open image]](upload/cr032/08029b.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.