This photo has been cropped slightly, to make the columns look straight and to crop some stuff on the right; it has been shot at f 2,4. Since the model has been moving, the focus is not perfectly on her face.
Pay attention to the incredible micro contrast and the rich tonality
85 mm is the ideal focal length to take portraits and at f 2,4 this lens has a very nice transition from in-focus-areas to out-of-focus areas even at f 2,8.
Some complain that the lens renders colors muted; others describe punchy colors. In my view, what is described as muted colors is the incredible way in which this lens renders skin colors.
The lens has god contrast and renders tonal transition very nicely
As you can see from the sample images, the lens is rather soft wide open. In my view, this is no disadvantage since the overall- look of the image is more harmonic like that; the character of the photo becomes painterly, feminine dreamy. Like this, the transition from in- focus- areas to out- of- focus- areas is very pleasing.
On the second photo you can see that the bokeh balls are rendered egg shell shaped, even at the center of the image. Yet, the overall quality of the bokeh is very pleasing.
The colors which are coming from this lens are saturated and punchy, which befits well the way this lens renders in general. The way this lens renders tonality, which is best seen in black and white is it's biggest weakness in my opinion, when compared to other expensive lenses. You can get punchy black and white photos, but I wished the gradual transition of values would be a little better.
Chromatic aberration can cause some problems, as you might expect from such a fast lens. Just be aware of it.
The construction of every lens is a trade- off. Since the Nocturnus is built for extreme speed, there are some downsides by definition. I actually do love this lens and it gave me fantastic images; Even though, this lens has some downsides as well, I would say that some of my most favored images I have been taken with this lens. It gives you enormous artificial possibilities. I would never give this lens away anymore.