This really is a tiny lens and you have to get used to the quirky way to change aperture on it. To do this you have to holt the focusing ring with one hand and rotate the front element with the other. First time I've seen this but I suppose I can get used to it. I also had difficulty in getting sharp images with this one but looking at these, they seen alright. Rendition is typical of a Voigtlaender lens, and I really like it.