| Contrast ratio | 1019:1 |
|---|---|
| Monitor model | imac 21.5" 2011 |
| Submitted | 17 Jan 2017 06:50 CET, by 154.58.*.* |
| Camera model | Sony DSC-RX100M3 |
| Processing remarks | Warning: Image ISO settings are not the same. |
| Black | |
| Screen photo |
|
| Luminance | 0 cd/m2 |
| Luminance spread | 0 cd/m2 (2 standard deviations) |
| Exposure value | –2.66 stops (aim for –2 to –3) |
| Exposure spread | 0.89 stops |
| Area used for calculation | 0.333 x 0.375 |
| Camera settings | Exposure time: 2.5 ISO: 4000 F-number: 1.8 Focal length: 24 mm (35 mm equivalent) Exposure compensation: 1.7 |
| White | |
| Screen photo |
|
| Luminance | 4.48 cd/m2 |
| Luminance spread | 0.45 cd/m2 (2 standard deviations) |
| Exposure value | –1.95 stops (aim for –2 to –3) |
| Exposure spread | 0.14 stops |
| Area used for calculation | 0.333 x 0.375 |
| Camera settings | Exposure time: 1/400 ISO: 6400 F-number: 1.8 Focal length: 24 mm (35 mm equivalent) Exposure compensation: 1.7 |
![[open image]](upload/cr041/10431a.jpg){kind=link}
![[open image]](upload/cr041/10431b.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.