Contrast ratio | 7324:1 |
---|---|
Monitor model | |
Submitted | 16 Jul 2009 23:45 CEST, by 67.223.*.* |
Camera model | Kodak EASYSHARE C643 ZOOM DIGITAL CAMERA |
Processing remarks | Warning: image file 1: camera was zoomed in too much. |
Black | |
Screen photo |
|
Luminance | 0.03 cd/m2 |
Luminance spread | 0.04 cd/m2 (2 standard deviations) |
Exposure value | –11.82 stops (aim for –2 to –3) |
Exposure spread | 2.42 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 1/8 ISO: 160 F-number: 4.8 Focal length: 108 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 199 cd/m2 |
Luminance spread | 52 cd/m2 (2 standard deviations) |
Exposure value | –2.17 stops (aim for –2 to –3) |
Exposure spread | 0.38 stops |
Area used for calculation | 1 x 1 |
Camera settings | Exposure time: 1/73 ISO: 160 F-number: 4.8 Focal length: 108 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.