| Contrast ratio | 569:1 |
|---|---|
| Monitor model | Conrac 6020AD |
| Submitted | 16 Jul 2008 09:53 CEST, by 193.163.*.* |
| Camera model | Canon PowerShot S50 |
| Processing remarks |
|
| Black | |
| Screen photo |
|
| Luminance | 0.6 cd/m2 |
| Luminance spread | 0.11 cd/m2 (2 standard deviations) |
| Exposure value | –2.81 stops (aim for –2 to –3) |
| Exposure spread | 0.25 stops |
| Area used for calculation | 0.482 x 0.482 |
| Camera settings | Exposure time: 0.4 ISO: 400 F-number: 2.8 Focal length: 33.4 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 340 cd/m2 |
| Luminance spread | 23 cd/m2 (2 standard deviations) |
| Exposure value | –0.99 stops (aim for –2 to –3) |
| Exposure spread | 0.1 stops |
| Area used for calculation | 0.482 x 0.482 |
| Camera settings | Exposure time: 1/403 ISO: 400 F-number: 2.8 Focal length: 33.4 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr001/00428a.jpg){kind=link}
![[open image]](upload/cr001/00428b.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.