| Contrast ratio | 968:1 |
|---|---|
| Monitor model | LG L227WT |
| Submitted | 14 Jun 2008 08:08 CEST, by 79.112.*.* |
| Camera model | Hewlett-Packard HP PhotoSmart C945 V01.7 |
| Processing remarks | Warning: Image ISO settings are not the same. |
| Black | |
| Screen photo |
|
| Luminance | 0.22 cd/m2 |
| Luminance spread | 0.07 cd/m2 (2 standard deviations) |
| Exposure value | –1.95 stops (aim for –2 to –3) |
| Exposure spread | 0.47 stops |
| Area used for calculation | 0.752 x 0.749 |
| Camera settings | Exposure time: 8.4 ISO: 100 F-number: 2.9 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0.328 |
| White | |
| Screen photo |
|
| Luminance | 215 cd/m2 |
| Luminance spread | 46 cd/m2 (2 standard deviations) |
| Exposure value | –1.91 stops (aim for –2 to –3) |
| Exposure spread | 0.31 stops |
| Area used for calculation | 0.752 x 0.749 |
| Camera settings | Exposure time: 1/225 ISO: 200 F-number: 2.9 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr001/00373a.jpg){kind=link}
![[open image]](upload/cr001/00373b.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.