This lens has only had light usage and is in excellent condition.  This is not a weather sealed lens so you can see some internal dust if you look for it, but it does not affect images.  I was using this on the Sony A7 with an adapter (not included).  It's a nice compact size, perfect for mirrorless cameras.  I am selling due to switching to the Fuji X system and no longer needing a fast lens at this focal length.