> Yup, you're right, although I've heard "Pentax SM" more often than
> "Practika SM."
Before I came to this list around 1996 I had only heard of Praktica thread.
I guess it depends on where you live.
> BTW, was the implementation of automatic aperture on these lenses also
> invented by someone else? Was it standard?
As far as I know it is a later extension of the mount, much like how Pentax
added all kinds of contacts to the first K mount.
Frits
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