The price of the SD1M is still way too high!

Started Apr 12, 2013 | Discussions thread
Roland Karlsson
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Re: Don't copyrights slow this kind of thing up?
In reply to DaSigmaGuy, Apr 13, 2013

DaSigmaGuy wrote:

I don't see why as the patent on the original manual K mount has long expired by now...The current AF version of the K mount is mechanically identical and only differs in having electrical connections.

Sigma already knows the proto calls for these connections and it has made thousands of PK mount lenses, so there should be no problems at all if they wanted to wack a PK mount on a DPM.

There might be patents on the electrical connections also.

Current cameras use the KAF2 mount.

In practice I think its hard to claim a patent on an interface.

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