It's not the art version but from my reading, it's 95% as good, considerably less weight and size and half the cost. It's a very sharp 50mm F1.4. Really excellent condition - I bought on a whim and slowly realised that I have neither the patience nor the energy required for prime lenses. There is a single piece of dust that you can see inside but the has never created any any issues in photographs. Pairs beautifully with my Nikon D810.
eBay