Well, with bokeh, it is always a gamble. However, it could be an effect of the stacking software, which sometimes causes less-then-smooth background surfaces. It is good to have technical feedback, but concept feedback is also nice to receive. As for me, I am a concept photographer. Yes, I work on the technique, but the content and context is always more important to me, trying to capture the feeling of what I see. It goes without saying (or we can say it again) that what we capture outside is always a projection of what we see from inside. Around here we have whole fields of sunflowers all pointing their faces at the Sun. I have yet to learn to be a landscape photographer. Perhaps I am waiting for the 24mm Zeiss Otus which is rumored to be announced soon.