Raspberry Pi upgrades its Camera Module with HDR, autofocus, and more

I saw that too. It looks interesting, though more so if you have Canon lenses for other cameras, since that seems to be what the big exchangeable lens adapter is designed for.

Unfortunately I only have Pentax and Leica 3b (screw mount) exchangeable lenses.

It's not, the new one is

I was referring to the Pi High Quality Camera, which requires a C or CS mount lens (25mm screw thread).

My lens collection, which I have used extensively on both Leica 3B and Pentax Spotmatic F bodies, all have a 40mm screw thread mount so, as I said, my lenses won't work with the new High Quality Pi camera.

The Ars article I was using as a reference is here:

I was too, and I linked to the C/CS-mount wiki page. That's the previous HQ Camera. The new one is the same but with a different S-mount, also called M12. Neither are Canon-specific: "It's not [designed for Canon lenses]".