Great idea! It was a bit tight, but after some filing with a knife it fit.
Hereâ€™s what happens:
The infinity turns into about 50cm. So if you cannot focus your lens past infinity, you will not be able to focus on anything farther away than 50cm. This calculation is for a 50mm lens. So you get a tilt macro lens.
The difference in focusing plane on a cropped sensor (between the left most focusing point and the right most) is about 7cm (again for a 50mm lens focused at infinity).
If someone improves on this model:
Make the round pieces smoother.
The piece that attaches to the lens can be longer (current distance between the edge to which the lens is attached and the ribs is 1.5mm, and the measured distance on the camera is 3.2mm)