I have the Oly TCON17 for my FZ50 and it works with no additional
adapter required - just make sure there are no additional letter
suffixes after it that indicate other than 55mm threads. I also have
gotten a 77-72 step ring for the unthreaded front. This screws in
permanently to the unthreaded front plastic (the metal step ring will
cut its own threads - just be careful to have it flat and flush
against the front on the lens). This allows me to have 72mm lens
cap, UV filter or polarizer on it, and I've added a cylindrical metal
3 inch lens hood.
I recently got a Nikon 1.5x TC15ED tcon. While I prefer the Nikon
for its sharpness and contrast, I still feel the TCON17 is a great
value at any price under $100. I also got a 58-55 step ring so can
mount the TCON17 in front of the Nikon 1.5 for REALLY long reach ...
but that's another thread ;-).
--
Rich
Take many pictures - a few are keepers, the rest are are lessons.