Contrast ratio | 52:1 |
---|---|
Monitor model | |
Submitted | 25 Dec 2013 22:52 CET, by 109.111.*.* |
Camera model | Canon PowerShot S5 IS |
Processing remarks | Warning: image file 1: automatic white balance can cause inaccuracies. |
Black | |
Screen photo |
|
Luminance | 4.86 cd/m2 |
Luminance spread | 12.98 cd/m2 (2 standard deviations) |
Exposure value | –2.47 stops (aim for –2 to –3) |
Exposure spread | 4.25 stops |
Area used for calculation | 0.549 x 0.549 |
Camera settings | Exposure time: 1/60 ISO: 1600 F-number: 2.9 Focal length: 38 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 250 cd/m2 |
Luminance spread | 188 cd/m2 (2 standard deviations) |
Exposure value | –1.98 stops (aim for –2 to –3) |
Exposure spread | 1.14 stops |
Area used for calculation | 0.513 x 0.513 |
Camera settings | Exposure time: 1/159 ISO: 100 F-number: 2.7 Focal length: 35.5 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.