> Andrew Fildes <afildes@xxxxxxxxxxxxx> wrote:
>
> I'm having trouble with this one as well.
> In the studio, if I use a soft box, it's hardly a 'point source' but
> its output is governed by the inverse square law (thank goodness, as
> i have a couple of old non-adjustable heads).
> Again, I have noticed that if i move the camera position well back
> and nothing else, from an evenly lit subject such as a person against
> a backdrop with a similar tone to skin, then there seems to be a drop
> in the light reaching the camera.
> This made sense to me - why should there be any difference in the
> behavior of light emitted and light reflected? - photons are photons.
> Never really bothered to check it - I just check the histogram every
> time I change a set up significantly - but it seems to make sense.
> But then of course, using an incident light meter makes nonsense of
> all that too.
> Bugger - I'm confused.
Perhaps it's just a 5D problem ?
...Wayne
Wayne Harridge
http://lrh.structuregraphs.com
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