I used the Fuji 16-55m zoom on the X-T2 set for a mid range of about 40mm. I thought I might lose the background scene through the low contrast haze so I set the aperture to f/16 to keep both the ice and building in good focus. A good depth of field was also important because I had tilted the camera up to frame the shot. This would naturally put a plane of focus across only one part of the icy window had I used the aperture more open.
The top photo variation was taken with an B&W Acros setting, while the photo on the bottom used a Provia film setting. The blue tint was due to the cool color temperature from the heavy overcast.