The lens that I always used as my Olympus camera prime. A really excellent piece of glass, and I have heard that this focal length is the best that came out of the Maitani’s shop. Could be, could be. All I know is that no matter what else I use on my OM1 or OM2n or indeed on the OM10, I seem not to get the same image quality as with this beautiful Japanese lens, the Zuiko Auto-S 50mm 1.8.