Contrast ratio | 539:1 |
---|---|
Monitor model | |
Submitted | 23 Apr 2008 13:27 CEST, by 82.65.*.* |
Camera model | Kodak CX7430 ZOOM DIGITAL CAMERA |
Processing remarks | image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. |
Black | |
Screen photo |
|
Luminance | 0.86 cd/m2 |
Luminance spread | 0.39 cd/m2 (2 standard deviations) |
Exposure value | –1.85 stops (aim for –2 to –3) |
Exposure spread | 0.67 stops |
Area used for calculation | 0.491 x 0.491 |
Camera settings | Exposure time: 0.5 ISO: 400 F-number: 2.7 Focal length: 34 mm (35 mm equivalent) Exposure compensation: 2 |
White | |
Screen photo |
|
Luminance | 465 cd/m2 |
Luminance spread | 62 cd/m2 (2 standard deviations) |
Exposure value | –2.93 stops (aim for –2 to –3) |
Exposure spread | 0.19 stops |
Area used for calculation | 0.491 x 0.491 |
Camera settings | Exposure time: 1/512 ISO: 400 F-number: 5.7 Focal length: 34 mm (35 mm equivalent) Exposure compensation: -0.5 |
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.