Just a heads up for anyone looking for a collapsing hood for their P20. The bower one does not work, the 20mm barrel when you turn off the camera retracts lower than the outside surface of the lens. The hood screwed in is wider than the barrel so it jammed when turned off! Luckily it didn't seem to break my autofocus motor. Just a heads up for anyone shopping around. Hopefully this saves others time / money. On that note, anyone know of a working collapsing hood? I've seen images on other threads with it but what model works specifically?