| Contrast ratio | 618:1 |
|---|---|
| Monitor model | Nokia Lumia 620 High Brightness |
| Submitted | 14 Aug 2014 04:07 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 | 0.68 cd/m2 |
| Luminance spread | 0.3 cd/m2 (2 standard deviations) |
| Exposure value | –2.01 stops (aim for –2 to –3) |
| Exposure spread | 0.65 stops |
| Area used for calculation | 0.811 x 0.912 |
| Camera settings | Exposure time: 2.5 ISO: 200 F-number: 4 Focal length: 58.4 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 421 cd/m2 |
| Luminance spread | 281 cd/m2 (2 standard deviations) |
| Exposure value | –2.38 stops (aim for –2 to –3) |
| Exposure spread | 1 stops |
| Area used for calculation | 0.974 x 1 |
| Camera settings | Exposure time: 1/320 ISO: 200 F-number: 4 Focal length: 70.1 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr032/08030a.jpg){kind=link}
![[open image]](upload/cr032/08030b.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.