Legendary COMPUTAR-dL 50mm f2.8 Enlarging Lens, excellent The most demanding darkroom workers use Computar Lenses. This is a beautiful 50mm f2.8. I have been delighted with its performance. From APUG Aug 7, 2008: Computars are included in Ctein's ratings of the best enlarger lenses in 50, 55, and 63mm focal lengths. If I look at it with just the right light I can see a very faint rainbow effect on the glass as seen in the photograph. It doesnt hurt the optical performance. Im disassembling my darkroom. $60 cheap! I am happy to sell items on APUG and I make a contribution to APUG. To make this work please: To buy send me a private message (PM) with your email address for use in communicating; I will provide my email address via PM. If you use PayPal I will ship to the address PayPal provides. USA only. For shipping I will charge you what the USPS charges me. When you pay tell me what you are buying!.