--- Ian Montgomery <[EMAIL PROTECTED]> wrote:
> Looking at the EOS Magazine article again, the
> length of the 400mm f4 is 317mm.
> The DO version is 233mm. So, *technically*, Canon
> has a 300mm lens that gives
> you 400mm magnification?
Huh? Isn't length referring the the physical size of
the lens? There's no exact relationship between
length and focal length in modern telephoto designs.
In fact, the entire concept of a "telephoto" is that
it gives equivelent magnification in a shorter package
than a simple long-focus lens.
=====
Bob Meyer
I wish I knew what I know now, when I was younger...
http:\\www.meyerweb.net\epson
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