Sorry to post non-RF shots here, but the file size limit is too small on dslrexchange, though I did post links over there.
... joe can delete or command me to do so!
I recently acquired a Vivitar 2x macro focusing teleconverter from a good friend of mine, along with an OM-2 (sold to Joe), a 50/1.4 (my second), and some other goodies. I just had
to try the Vivitar telextender and the 50/1.4 together.
While the gear was intended to be sold for my scanner fund, I'll probably keep the Vivitar glass for awhile.