On another great Craigslist buy i got a Minolta and an Fe Nikon for 50 bucks.One of the lens i got was a odd duck it is a 'Continental Optics 80-200mm F3.5 Fixed with a locking rotating collar as it has a huge front element.Its MC.Oh yes and its a two collar zoom. But a Google search drew a blank.I have never heard of them but its in a MD mount. Lets add one more i keep looking thru this bag and keep finding things.Very clean Tefnon F4 fixed 80-200mm zoom also MD mount. Anyone ever heard of them..??