Originally posted by clackers my guess is 0% are … that when we buy a Sigma K mount lens it's been on a shelf somewhere for years!
Well, Sigma currently have 6 newish K-mount lenses, and 2 older ones, active in their catalogue. The 6 'C' and 'A' lenses are pretty new, so whatever the date the last one was introduced may give a timeline for when Sigma lost interest in Pentax.
The 18-200 C was released late 2014, as was the 30mm f1.4, but maybe 2015? That was the date of the release of the K-mount 18-300 C, and the last Sigma lens firmware update via their USB dock for Pentax.
But Sigma, once again, are a bit weird with their mount support. They have randomly dropped Nikon items from their catalogue too - lenses, flashes etc - even though they have traditionally supported Nikon very well. But now their priorities seem: Canon, Sony E-mount, and the new L lens alliance. Sigma have even announced that they will be effectively downgrading future support for their own SA mount as they swing their resources behind L-mount.