But Maciej is now shooting with a smartphone (as we all) and needed to adapt, he made this pictorial for us explaining how to use an industrial CCTV lens to create a real smartphone Tilt-Shift effect.
The lens in question is a Goyo 4.5mm f/1.4 lens (but other lenses are a pretty cheap to obtain). The first step is to take it apart and combine the front element with one of the back elements with a few small plastic screws. You can add a zip tie if you want, but it is not necessary. The elements of choice may vary depending on the CCTV lens that you use.
The next step involves a rubber band and a smartphone case.
And this is what you get after a quick snapseed edit: