Nikon Ai-S 50mm F1.4 - Defective Helicoid grease is gone and there is clouding. There may be other issues as well, so please understand that this is being sold as junk. Please refrain from purchasing if you are overly concerned about condition. Please understand the meaning of "sold as junk" in the description before asking questions or purchasing. Returns are not accepted due to the nature of the product.