At 11:41 AM 1/4/2009, Chuck wrote:
><snip> What I don't
>understand is why, once the light has struck and reflected off the
>subject, why the subject is not treated as the "light source" for the
>reflected light that's emanating from it in the same sense as the sun is
>a light source.
The subject just gets smaller with distance. Hence there is less light
reaching the lens, but the illumination of the subject is the same, just
that its size in the frame is smaller.
If it is the only subject, then an average meter would vary, but a spot
meter on the subject would be constant with distance.
WayneS
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|