| Contrast ratio | 1136:1 |
|---|---|
| Monitor model | xl2370 |
| Submitted | 13 Aug 2013 20:44 CEST, by 80.117.*.* |
| Camera model | Pentax K-x |
| Processing remarks | Warning: Image focal lengths/zoom levels are not the same. |
| Black | |
| Screen photo |
|
| Luminance | 0.18 cd/m2 |
| Luminance spread | 0.04 cd/m2 (2 standard deviations) |
| Exposure value | –2.31 stops (aim for –2 to –3) |
| Exposure spread | 0.34 stops |
| Area used for calculation | 0.375 x 0.422 |
| Camera settings | Exposure time: 3 ISO: 800 F-number: 5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 204 cd/m2 |
| Luminance spread | 87 cd/m2 (2 standard deviations) |
| Exposure value | –1.71 stops (aim for –2 to –3) |
| Exposure spread | 0.62 stops |
| Area used for calculation | 0.5 x 0.562 |
| Camera settings | Exposure time: 1/250 ISO: 800 F-number: 5 Focal length: 36 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr027/06797a.jpg){kind=link}
![[open image]](upload/cr027/06797b.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.