Re: EOS EF 20-35 with extension tubes

[Pierre Bellavance]

I agree.

I wonder what is the magnification ratio of the 20-35 at 20mm, closest 
focus of 1.1 feet.

Pierre

At 17:08 2/25/2001 -0500, you wrote:
>Because the maximum reproduction ratio for the 20-35 is measured at 35mm
>and minimum focus distance, while the 20mm is much wider but focuses
>closer.  It is like comparing two different lenses for this spec.  They
>certainly aren't quoting the reproduction ratio for the 20mm end.
>
>Mike
>
>
>
>Pierre Bellavance wrote:
> >
> > Hi,
> >
> > What surprises me is that the magnification ratios of these two lenses are
> > almost the same (0.14 for the 20mm vs 0.13 for the 20-35) while their
> > closest focusing distances are quite different.
> >
> > How can that be?
> >
> > Pierre

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