What creates a calisson-like light bokeh like this (made with the signature Arri T / 1.9)? The more the angles are away from the center, the more the angles are present, why?
Another objective (Zeiss Supreme T / 1.8) gives another form:
How (where in the lens) to shape this form? Yet, why (how) in the case Zeiss, the bokeh seems more difficult, even if the opening is the same (1.8 ~ 1.9)?