Originally posted by Bick Hi,
I have the Sigma 70-200 HSMII and the Kenko pzAF 1.5 Teleplus SHQ and can confirm that it does work - sorta. Sometimes it will lock focus quickly, other times it will 'hunt' a lot. Using full time manual over-ride to close focus first helps. Image quality is very good though. HTH
Bick
I have this same combination. With my K10d, it does try to AF, but never can lock into correct focus. I winds up a little out of focus. Too much to be usable that way. The TC works great with other lenses including the Tamron 70-200