>Note that I prefer a non-floating element macro lens as a workhorse
>lens for macro work. although the 90/2 macro is the better general
>purpose lens, and a superb macro lens as well, I find the Tamron 90/2.5
>or tokina 90/2.5 macro's to be more convenient for actual macro work. the
>reason is that they are *not* floating element lenses, so it doesn't
>matter whether extension is in a tube of in the lens helicoid. with
>these lenses, extension is extension is extension.
According to the Tamron info with my 90mm f2.5 49mm thread, the lens does
have floating elements.
Foxy
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