When buying, I rejected 2 out of 3, they tried to sell the front-back focus. The focus really did not please, even the one chosen from 3 lenses still does not work quite correctly. Bokeh is not beautiful, more like some kind of chaotic distortion of space. In general, it was, of course, worth its money, but only up to a rise in price. Now its price is completely unjustified, about 10,000. I do not recommend buying a lens for those who have money for its more expensive versions. Now I wouldn't buy it. I will most likely sell.