Taylor & Hobson .5" Inch f/2.5 Trital Vintage Screw D Mount Camera Lens. Nice lens from a huge estate collection. It does need to be cleaned a bit as it has been sitting in storage. Looks to be in overall good condition. May require an adapter ring depending on the camera. The person who had this had a very unique large lifetime collection, so I will be listing other related items. Thank you for looking and don't miss out on this great find.