A evening with the Asahi Pentax Super Takumar 105mm f/2.8 and the Sony Alpha A7

I don't know if it is luck or a depreciating market, but I was able to score the Asahi Pentax Super Takumar 105mm f/2.8 m42 mount lens for approximately $60 on eBay. I wanted to find a decent telephoto prime to take over my second copy of the Olympus OM 135mm lens which has been somewhat of a disappointment to me. It's quite possible I picked up a bad copy but it is the only Olympus OM lens I own that I might just let sit on the shelf. A couple of bids later, I take delivery of a clean, fungus and haze free screw mount lens.