Fujinon-EX 135mm f5.6 enlarging lens for 4x5 negs. This is a very sharp performer. Do a quick Google search if interested in more details. It has 1/2 stop clicks and max f45. 53mm threads. Glass is perfect, slight ding in the filter ring, although I can't imagine why you would need the filter ring... Overall condition is great, no scratches or brassing. Includes one lens cap. Like to get $75 shipped OBO.