I bought this teleconverter based mainly on its cheap price. It is convenient to use on my FZ150 camera as it screws right on the lens. Unfortunately if one examines ones photos very carefully, the optical properties fall short. It is visibly less sharp than the Olympus B-300 or Tcon-17, which are much larger and about 4 times the price. You get what you pay for. It is OK for snapshots, but not if I intended to enlarge the photos very much.