| Contrast ratio | 951:1 |
|---|---|
| Monitor model | Samsung Syncmaster 2433 |
| Submitted | 28 Aug 2011 05:44 CEST, by 77.13.*.* |
| Camera model | Canon EOS 550D |
| Processing remarks | Warning: image file 1: camera was zoomed in too much. |
| Black | |
| Screen photo |
|
| Luminance | 0.21 cd/m2 |
| Luminance spread | 0.23 cd/m2 (2 standard deviations) |
| Exposure value | –2.23 stops (aim for –2 to –3) |
| Exposure spread | 1.72 stops |
| Area used for calculation | 1 x 1 |
| Camera settings | Exposure time: 2.6 ISO: 400 F-number: 3.5 Focal length: 115 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 204 cd/m2 |
| Luminance spread | 92 cd/m2 (2 standard deviations) |
| Exposure value | –2.34 stops (aim for –2 to –3) |
| Exposure spread | 0.66 stops |
| Area used for calculation | 0.758 x 0.853 |
| Camera settings | Exposure time: 1/395 ISO: 400 F-number: 3.5 Focal length: 54.6 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr017/04390a.jpg){kind=link}
![[open image]](upload/cr017/04390b.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.