What changes with distance is subject size. This follows the same
square-root laws as light fall-off. So, if you consider that at 4 feet a
subject fills the viewfinder, it is at, say 100%. But at 8 feet, the
subject only occupies 50% of the viewfinder. The quantity of light reaching
the viewfinder is 50%, but that which does is still at 100% intensity.
There is a slight bit of fall-off with distance, but the fall-off is
measured in billions of light-years of distance. Oh, and you will need to
do a white-balance correction on that too, since it trends towards a
red-shift.
:)
AG
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|