I don't know if it is considered HD but the Century 0.55x wide angle is a very good low profile lens that seems to work quite well on HD cameras.
I've noticed some chromatic aberations at the edges of the frame but otherwise it seems to be very popular among camera flyers looking for a low profile lens.
It is however not possible to zoom in fully while using autofocus with this lens. (because it is a single element.)
(This post was edited by Icon134 on Mar 4, 2009, 5:25 AM)
