As we are all aware, the more blades there are in a lens’s diaphragm, the rounder the resulting hole can be made, and in turn this gives a more natural looking bokeh.
So on receiving my recent Hasselblad Carl Zeiss distagon 4/50 lens, i was rather, well, confused, to see that it has a straight-cut 5-blase diaphragm, basically leaving you with a pentagonal hole as an aperture...
I have yet to compare its results to my 9-blade Nikkor 50mm 1.4f, which has a "near as damn it" circular aperture at all f-stops, so I want to know, is this decision for a particular reason? does it give a certain "zeiss look"? Its certainly not a technical limitation of its age.
(For reference the lens was made in 1985)