| Contrast ratio | 996:1 |
|---|---|
| Monitor model | |
| Submitted | 14 Nov 2011 17:20 CET, by 90.178.*.* |
| Camera model | Nikon D90 |
| Processing remarks | Note: image file 2: suggested exposure time: 1/460 s (Set EV to -1.2) |
| Black | |
| Screen photo |
|
| Luminance | 0.25 cd/m2 |
| Luminance spread | 0.04 cd/m2 (2 standard deviations) |
| Exposure value | –2.3 stops (aim for –2 to –3) |
| Exposure spread | 0.22 stops |
| Area used for calculation | 0.458 x 0.517 |
| Camera settings | Exposure time: 2.5 ISO: 400 F-number: 3.8 Focal length: 33 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 250 cd/m2 |
| Luminance spread | 24 cd/m2 (2 standard deviations) |
| Exposure value | –1.31 stops (aim for –2 to –3) |
| Exposure spread | 0.14 stops |
| Area used for calculation | 0.416 x 0.47 |
| Camera settings | Exposure time: 1/200 ISO: 400 F-number: 3.8 Focal length: 30 mm (35 mm equivalent) Exposure compensation: 0 |
![[open image]](upload/cr018/04623a.jpg){kind=link}
![[open image]](upload/cr018/04623b.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.