Hello fellow legacy lens enthusiasts! I am after a cheap (hopefully under $50 but $100 max incl. shipping to Canada) 135mm f2.8. From the research I have done, it seems like the Soligor or Vivitar offer some of the highest 'bang for your buck'... at least in this price range. However, I am aware that both of these seem to come in many varieties, so I before I jump in, I'm just after any helpful tips, or if anyone has a better suggestion that I may have overlooked. I currently have a c-mount, nikon g mount, and m39 mount adapters if that matters. Obviously, I am happy to buy another cheap adapter if it saves me at least its value on a lens. Thanks for any replies.