Bob Meyer wrote:
--- "Kotsinadelis, Peter (Peter)" <[EMAIL PROTECTED]>
wrote:
> The main difference with Canon is that they do not
> include distance (with
> Nikon D Lenses) in the metering algorithm as Nikon
> (and now Minolta with
> their D lenses) does.
Actuallly, Chuck Westfall (of Canon, for those who
don't know), has told me that at least some current
bodies DO use distance info as part of the flash
exposure algorithm with lenses that provide it the
info. But Canon uses it as a secondary factor, not
the primary factor that Nikon does.
=====
Bob,
Sounds good, but somehoe I do believe it. Reason being the spin doctors at
Canon would have talked this one up since the 3D feature of Nikon is so
highly regarded.
Secondly, according to all I read about E-TTL it fires a low-power preflash
of a known level to determine correct flash exposure to measure reflectance
of the scene, then calculates proper flash output to achieve a midtoned
subject. The metering it uses for ALL E-TTL autoflash is the 21-zone
evaluative metering linked to the focusing point. So where does distance
come in?
Peter K
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