| Contrast ratio | 1219:1 |
|---|---|
| Monitor model | |
| Submitted | 01 Oct 2014 23:20 CEST, by 90.191.*.* |
| Camera model | Pentax K-500 |
| Processing remarks |
|
| Black | |
| Screen photo |
|
| Luminance | 0.05 cd/m2 |
| Luminance spread | 0.01 cd/m2 (2 standard deviations) |
| Exposure value | –2.59 stops (aim for –2 to –3) |
| Exposure spread | 0.36 stops |
| Area used for calculation | 0.374 x 0.424 |
| Camera settings | Exposure time: 8 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 3.3 |
| White | |
| Screen photo |
|
| Luminance | 66 cd/m2 |
| Luminance spread | 8 cd/m2 (2 standard deviations) |
| Exposure value | –2.66 stops (aim for –2 to –3) |
| Exposure spread | 0.18 stops |
| Area used for calculation | 0.374 x 0.424 |
| Camera settings | Exposure time: 1/160 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr032/08131a.jpg){kind=link}
![[open image]](upload/cr032/08131b.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.