I personally find the 24mm (35m equiv) wide enough, thus have never really thought about getting any adapters.
Was looking for a cheaper alternative to the original threaded filter adapter/hood-like thing, though. The one with the 52mm thread as shown in the photo above.
Yeah, it's sort of a "compromise" to have a fast lens in a sufficiently small body. If you use tele converter, will be tough to hold the cam steady though, I reckon.