Actually, this lens must wear the red L-ring. While it is not particularly fast and the delivery is spartan - the GeLi you have to buy it. But: The picture quality is beyond any doubt good and light weight in relation to the large light gathering power make DASD lens an indispensable companion. I come for some time, more and more of the zoom lenses from and take fixed focal lengths. And since I do not want to renounce this objective.