On Sun, 6 May 2001, Julian Loke wrote:
> >> Julian Loke wrote:
> >> ... ignoring "bright segments" or "dark segments"? ...
>
> > "Hugo G�vert" <[EMAIL PROTECTED]> wrote: ...
> > The EOS-3 Technical Overview also tells something about the evaluative
> > metering...
> > ... in the text they write: "The camera automatically corrects exposure to
> > achieve the optimum setting by processing comparative data on readings
> > taken for the primary, secondary and peripheral metering zones." So it
> > seems that it is not just center weighted-like metering that is weighted
> > on the active AF point.
>
> Hi Hugo, Thomas, and List,
>
> Could the quote also be describing a comparative weighting system
> (e.g. 60% primary, 30% secondary, 10% peripheral)?
> And could a simple a weighting system e.g. 70/20/10/0% still be
> consistent with Canon's own explanation of Evaluative metering?
It _could_ give quite simiral results. But I think the main thing is that
the exposure is adjusted "by processing comparative data". That's clearly
not describing just a simple weighted system. I think that quite clearly
says that it's comparing the scene to something in memory. It does include
note that there are differently weighted areas, and doesn't give full
explanation so it might still include the exclusion of very bright small
highlights is scene (as done in E-TTL apparently - I've also taken images
with sun directly in frame without large problems...)
Best regards,
Hugo.
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** Hugo G�vert **
** [EMAIL PROTECTED] http://www.hut.fi/~hugo **
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