Here are some photos taken with this lens.
I do not have a good scanner for negatives so I used a cheap camera to take photos of the negative images. That's why they are not good looking and a bit blurry.

It turned out the best photos were trees.

Another one, together with an image with the standard 2,8/35mm lens shot from the same position.

I did this project for fun and therefore claim it success.
A lot can be optimized but I'll keep it as an experimental lens just as it is right now.

It seems as if the focus lies inside the tree's crown but is very narrow.
As previously stated, it was only a fun project an has lots of space for improvements.