Has anyone with a K-5II or K-5IIS retested SDM lenses with a TC?

I'll see what I can do.

Most of my photography is nature related and I was keen to see if any moire pattern showd up in fine feather detail. Took a few shots of some small birds but there was no evidence of moire at all, just lots of fine detail.

As for the TC and focusing, I just had a play at home in a well lit room, using the TC with a DA*300mm and Sigma 50-150mm F2.8 HSM.  Focus was a bit hit and miss with the TC and took a few quick presses of the AF button before focus locked.  Might be the light so I'll try again with the 300mm and TC's in daylight on the walk tomorrow and get back to you.