| Contrast ratio | 3848:1 |
|---|---|
| Monitor model | |
| Submitted | 11 May 2012 02:05 CEST, by 68.192.*.* |
| Camera model | Nikon D3100 |
| Processing remarks | Warning: image file 1: exposure time below 1/500 sec is unreliable. Try increasing the EV compensation. |
| Black | |
| Screen photo |
|
| Luminance | 0.07 cd/m2 |
| Luminance spread | 0.05 cd/m2 (2 standard deviations) |
| Exposure value | –17.25 stops (aim for –2 to –3) |
| Exposure spread | 1.02 stops |
| Area used for calculation | 0.375 x 0.422 |
| Camera settings | Exposure time: 1/4000 ISO: 400 F-number: 3.5 Focal length: 27 mm (35 mm equivalent) Exposure compensation: 0 |
| White | |
| Screen photo |
|
| Luminance | 258 cd/m2 |
| Luminance spread | 39 cd/m2 (2 standard deviations) |
| Exposure value | –0.7 stops (aim for –2 to –3) |
| Exposure spread | 0.22 stops |
| Area used for calculation | 0.375 x 0.423 |
| 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/cr020/05032a.jpg){kind=link}
![[open image]](upload/cr020/05032b.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.