--- Daniel ROCHA <[EMAIL PROTECTED]> wrote:
> From: Bob Meyer <[EMAIL PROTECTED]>
> > a 28-105 f2.8 constant aperture
>
> Tamron have already made this lens. It's not as good
> as a 28-70 2,8.
>
> Increasing range occurs quality loss...
Yes, but increasing cost can overcome that loss, to a
great degree. Canon's 35-350 performs better than
most 70-300 or 100-300 range zooms. A 28-105 2.8
that's better than Tamron's wouldn't be hard to
make--just more expensive.
=====
Bob Meyer
Life is uncertain. Eat dessert first.
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