> >> Collected comments (just 1, actually) on the 50/2.8 PKA, which
> >> has a max. magnification of 1:2: O.U. Peterson: "All metal.
>
> > Wrong, its partly plastic,
>
> It does seem to me as if the aperture ring is probably plastic.
> However, the aperture ring nonetheless seems to have a nicer feel
> than the more obviously plasticky aperture ring on the A 50/1.7.
>

And the focus ring is plastic.

> > but this lens has also a floating element ( am I the first to have
> > noticed this ?)
>
> I hadn't noticed, but I don't really know how I would.  Just what
> did you see that allowed you to determine this, George?
>
> Fred

I noticed a zoom lens like mechanism when looking in the lens from the back.
And indeed, the second lens/group seen from the front does move as a
function of the focus ring.

George
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