I was very interested to see how using a TC 200 allows you to get to 1:1 as I happen to have one of these and the PN-11 is difficult to find or expensive. I have a 105 f2.8 MF and find this combination works really well. Not sure if there is any noticable loss of image quality using the teleconverter c.f extension rings
Tiny link: http://taii.cc/53