Contrast ratio | 763:1 |
---|---|
Monitor model | Samsung Syncmaster 2053bw |
Submitted | 29 Apr 2008 05:49 CEST, by 71.231.*.* |
Camera model | Canon PowerShot A520 |
Processing remarks | image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time. |
Black | |
Screen photo |
|
Luminance | 0.45 cd/m2 |
Luminance spread | 0.13 cd/m2 (2 standard deviations) |
Exposure value | –3.41 stops (aim for –2 to –3) |
Exposure spread | 0.43 stops |
Area used for calculation | 0.5 x 0.5 |
Camera settings | Exposure time: 0.3 ISO: 400 F-number: 2.6 Focal length: 34.6 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 346 cd/m2 |
Luminance spread | 76 cd/m2 (2 standard deviations) |
Exposure value | –2.06 stops (aim for –2 to –3) |
Exposure spread | 0.32 stops |
Area used for calculation | 0.5 x 0.5 |
Camera settings | Exposure time: 1/1002 ISO: 400 F-number: 2.6 Focal length: 34.6 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.