so u need or dun need wider than 24mm?
Anyway pana is not the only wide conversion lens around
u may need to do a bit of leg work to find sigma/ oly/ canon/ nikon 0.7x convertor which can fit either 46mm or 52mm adaptors
At least the optics is still acceptable (esp since u r 5D user)
The LX3's only serve as my small travel camera so 24mm is ok. Anything wider i'll use my main one.