Anyone have any good or bad things to say about this lense? I got it off ebay for $70, $80 with shipping. I believe this lense is from the mid-1950's. What's amazing is that it has 14 aperature blades! I'm waiting for the adapter to come in the mail. Everything is clean on it. However, there's a tiny black dot about the size of the very tip of a ballpoint pen that is on one of the lens inside just about near the outer circumference.