<p>Douglas, yes, the teleconverter has a KA mount, but not KAF, so I focused manually, using a monopod to steady the setup. I also have a Katzeye focusing screen in the camera.<br>
I was surprised by the sharpness of the combination, too. I've tried the TC with other telephoto and zoom lenses, including the DA 50-200, with nothing like these results. It seems the 55-300 and the Kiron TC complement each other pretty well. <br>
Noel</p>