Hi and just to add, after so many years in the market, all these old legacy lenses has different 'wear' rate on the coatings and it is really difficult to sort out the great one from the average. From my experience, a not so good exterior copy (scratches on the soft front element) may actually give better, sharper picture compared to a great looking piece (less scratches). My favourite DR has a scratch on the rear element that will frighten everyone away at first look and its the DR I go to every time I needed one. the nice looking one get no air time haha