|Submitted||30 Dec 2008 08:34 CET, by 24.60.*.*|
|Camera model||Canon PowerShot SD870 IS|
Warning: image file 1: camera was zoomed in too much.
|Luminance spread||0.04 cd/m2 (2 standard deviations)|
|Exposure value||–6.43 stops (aim for –2 to –3)|
|Exposure spread||0.73 stops|
|Area used for calculation||1 x 1|
|Camera settings||Exposure time: 1 ISO: 400 F-number: 5.8|
Focal length: 102 mm (35 mm equivalent)
Exposure compensation: 0
|Luminance spread||27 cd/m2 (2 standard deviations)|
|Exposure value||–4.41 stops (aim for –2 to –3)|
|Exposure spread||0.3 stops|
|Area used for calculation||0.393 x 0.393|
|Camera settings||Exposure time: 1/202 ISO: 400 F-number: 8|
Focal length: 27.2 mm (35 mm equivalent)
Exposure compensation: -2
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.