|Submitted||11 Jul 2012 20:15 CEST, by 173.12.*.*|
|Camera model||Canon EOS 50D|
Warning: image file 1: automatic white balance can cause inaccuracies.
|Luminance spread||0.09 cd/m2 (2 standard deviations)|
|Exposure value||–1.81 stops (aim for –2 to –3)|
|Exposure spread||0.53 stops|
|Area used for calculation||0.485 x 0.545|
|Camera settings||Exposure time: 5.2 ISO: 400 F-number: 4.6|
Focal length: 34.9 mm (35 mm equivalent)
Exposure compensation: 2
|Luminance spread||86 cd/m2 (2 standard deviations)|
|Exposure value||–1.82 stops (aim for –2 to –3)|
|Exposure spread||0.59 stops|
|Area used for calculation||0.44 x 0.495|
|Camera settings||Exposure time: 1/166 ISO: 400 F-number: 4.6|
Focal length: 31.7 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.