Contrast ratio | 156:1 (edge: 305:1) |
---|---|
Monitor model | |
Submitted | 06 Jul 2010 10:53 CEST, by 80.98.*.* |
Camera model | Nikon COOLPIX L20 |
Processing remarks | Warning: image file 2: automatic white balance can cause inaccuracies. |
Black | |
Screen photo |
|
Luminance | 0.93 cd/m2 |
Luminance spread | 0.4 cd/m2 (2 standard deviations) |
Exposure value | –2.73 stops (aim for –2 to –3) |
Exposure spread | 0.63 stops |
Area used for calculation | 0.549 x 0.549 |
Camera settings | Exposure time: 1/6 ISO: 800 F-number: 3.1 Focal length: 38 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 145 cd/m2 |
Luminance spread | 42 cd/m2 (2 standard deviations) |
Exposure value | –2.32 stops (aim for –2 to –3) |
Exposure spread | 0.42 stops |
Area used for calculation | 0.549 x 0.549 |
Camera settings | Exposure time: 1/250 ISO: 282 F-number: 3.1 Focal length: 38 mm (35 mm equivalent) Exposure compensation: 0 |
Black at screen edge | |
Screen photo |
|
Luminance | 0.48 cd/m2 |
Luminance spread | 0.36 cd/m2 (2 standard deviations) |
Exposure value | –2.11 stops (aim for –2 to –3) |
Exposure spread | 1.14 stops |
Area used for calculation | 0.549 x 0.549 |
Camera settings | Exposure time: 0.5 ISO: 800 F-number: 3.1 Focal length: 38 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.