Shortest path to a T* lens

[Seele]

Seele: What is nisen and complex bokeh? do you have a picture that can serve as an example?

"Nisen" literally means "two-line", and refers to a "cross-eyed" appeareance in the out of focs area, where you can spot a doubling of image. "Complex boken" means many bad bokeh characteristics appear all at once.

There should be no shortage of photographs found online demonstrating these things.