> Date: Fri, 04 May 2001 10:44:05 -0700
> From: "Tom DelRosario" <[EMAIL PROTECTED]>
> Subject: Re: EOS ETTL and Metering mode
>
> > couldn't the flash calculation simply be
> > linked to the lens' focus distance so that whatever
> > you focus on is correctly exposed, rather than relying
> > on the amount of light coming back into the lens.
>
> Let's see, there is a useful feature and their major
> competitor has it. What does that mean? Most likely,
> Nikon has a patent for it and refuses to license it
> to Canon.
Calculating flash output from aperture and distance cannot
be patented, and even if so, any patent applicant could be
refuted by Canon because they did this before with a resistor
ring linked to the focussing on SSC standard lenses with the
old F-1 almost 30 years ago.
--
Michael Quack <[EMAIL PROTECTED]> http://www.photoquack.de
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