All my Pentax and Tamron lenses works properly on K-1 and mostly as I expected, some better some don't but without big surprises.
But with Sigma lenses it is completely another story, 4 AF lenses, one HSM, one HSM II, and two older screwdrive AF lenses:
1) Full frame lenses can't be recognized as full frame.
2) Lenses identifications are the same as Pentax lenses so they are messed my micro focus adjustment for Pentax lenses.
With Sigmas settings are usually -10 so if I forget to change that I'll have totaly unusable shoots with Pentax lenses. One full day of hiking and climbing was trashed because of that.
3) DC lenses are not usable at all in full frame mode at any aperture and any focal length.
4) Even full frame lenses have bad vignetting
5) At last some of them are not working at all
Above all local support is total disaster, so bye bye Sigma, I can live without you
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---------- Post added 10-11-16 at 08:00 PM ----------
Originally posted by deepbluish @banep
I've just attached it to my K-5 and it does focus in live view without any problems.
Thank you and congratulations again, you are probably the only winner in Sigma lottery b
ecause a) that lens is not working with original firmware on K-1 b) that lens can't focus properly wih original firmware in live view mode on K-5 (latest firmware 1.30 on cameras in both cases).