Originally posted by John Kovarik The Kenko 1.5 also supports SDM and produces high IQ but functioning is less certain (AF) than the TAMRON...........
John are you sure the Kenko 1.5 TC supports SDM.
I just bought a new Kenko 1.5 TC along with a new DA*300 and it will not autofocus the lens on my K10D (with firmware 1.3). Actually its not communicating with the camera as I can't get the Fn key to activate the Function screen (flashes on then off?.
THe DA*300 works perfectly alone and the Kenko 1.5 TC works well with a DA18-250 and a FA50 1.7
But no luck with the DA*300? Any thoughts?