Contrast ratio | 1362:1 |
---|---|
Monitor model | iPad new backlit 0% |
Submitted | 17 Dec 2012 23:11 CET, by 77.239.*.* |
Camera model | Canon EOS 5D Mark II |
Processing remarks | Warning: image file 1: automatic white balance can cause inaccuracies. |
Black | |
Screen photo |
|
Luminance | 0 cd/m2 |
Luminance spread | 0 cd/m2 (2 standard deviations) |
Exposure value | –4.09 stops (aim for –2 to –3) |
Exposure spread | 0.72 stops |
Area used for calculation | 0.678 x 0.762 |
Camera settings | Exposure time: 12.3 ISO: 200 F-number: 1.4 Focal length: 48.8 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 5 cd/m2 |
Luminance spread | 2 cd/m2 (2 standard deviations) |
Exposure value | –3.09 stops (aim for –2 to –3) |
Exposure spread | 0.4 stops |
Area used for calculation | 0.678 x 0.762 |
Camera settings | Exposure time: 0.3 ISO: 200 F-number: 5.7 Focal length: 48.8 mm (35 mm equivalent) Exposure compensation: 0 |
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.