I bought an HD6600 for my HV30. It has a 52mm thread which I use with a stepup ring, cos this was advised for best edge-to- edge sharpness. It is actually very good when shooting wide, but the image goes soft when zooming in.
I bought this lens because it is supposed to be zoom-through, and I was hoping to just leave it on the camera most of the time. In practice it is only really useable at wide angles, so now I wish I had bought an even wider lens that doesn't pretend to be zoom-through.