I know, old thread. I have used in the past an early 1990's Tamron 90mm that autofocused with the screw-coupler. Nice images, but the focus was sloooooww and hunted a lot. I used mainly for photographing my wristwatches, so I could take time in a studio setup.
I upgraded to the most current version "017". Internal focus motor, vibration compensation, and improved optical coatings that don't show reflections of the camera sensor off of the back lens element (a problem I notice with many pre-DSLR lenses). I love the lens, and it has gained added usefulness now that I have a FX body to use it on. It now doubles more readily as a portrait lens.
Macro shot intentionally showing the bokeh
And a significant crop-in