Contrast ratio | 213:1 |
---|---|
Monitor model | |
Submitted | 09 Jun 2010 21:57 CEST, by 206.197.*.* |
Camera model | Canon PowerShot S90 |
Processing remarks |
|
Black | |
Screen photo |
|
Luminance | 0.86 cd/m2 |
Luminance spread | 1.08 cd/m2 (2 standard deviations) |
Exposure value | –3.29 stops (aim for –2 to –3) |
Exposure spread | 2.15 stops |
Area used for calculation | 0.396 x 0.396 |
Camera settings | Exposure time: 1/5 ISO: 400 F-number: 2.8 Focal length: 27.4 mm (35 mm equivalent) Exposure compensation: 0 |
White | |
Screen photo |
|
Luminance | 183 cd/m2 |
Luminance spread | 53 cd/m2 (2 standard deviations) |
Exposure value | –1.54 stops (aim for –2 to –3) |
Exposure spread | 0.43 stops |
Area used for calculation | 0.396 x 0.396 |
Camera settings | Exposure time: 1/318 ISO: 400 F-number: 2.8 Focal length: 27.4 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.