| Contrast ratio | 442:1 |
|---|---|
| Monitor model | Dell P1130 |
| Submitted | 12 Jul 2018 08:49 CEST, by 124.197.*.* |
| Camera model | Nikon D3100 |
| Processing remarks | Note: image file 2: suggested exposure time: 1/63 s (Set EV to -1.1) |
| Black | |
| Screen photo |
|
| Luminance | 0.27 cd/m2 |
| Luminance spread | 0.06 cd/m2 (2 standard deviations) |
| Exposure value | –2 stops (aim for –2 to –3) |
| Exposure spread | 0.31 stops |
| Area used for calculation | 0.722 x 0.812 |
| Camera settings | Exposure time: 10 ISO: 200 F-number: 5 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 118 cd/m2 |
| Luminance spread | 12 cd/m2 (2 standard deviations) |
| Exposure value | –1.44 stops (aim for –2 to –3) |
| Exposure spread | 0.14 stops |
| Area used for calculation | 0.722 x 0.812 |
| Camera settings | Exposure time: 1/30 ISO: 200 F-number: 5 Focal length: 52 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr048/12144a.jpg){kind=link}
![[open image]](upload/cr048/12144b.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.