Here is the situation. I was in a residential neighborhood in the dead of winter. Everything living was dead (if that makes sense) and the color was far from exciting. Across the street was a huge pile of dirt that an excavator created the day before this shoot. But I had a beautiful subject.
I was evaluating the Zeiss Otus 55mm lens. I added a B+W XS-PRO CP filter and got down flat on the ground (the camera was against the street) to remove everything but the sky (and a street lamp) from the image.