Platinum RF
Well-known
Agreed of course.
But this is a replica. The Summicron 35mm f/2 with 8 elements has even steps. Rather strange that if one makes a replica to deviate from the original on this point, not only seen from the point of usefulness, but also from the point of looks. Allmost all Leica M lenses have evenly spaced f-stops. In my opinion this is a very important design factor.
Perhaps the makers of this replica found it very difficult to copy the original at this point.
Erik.
The newer version has even spaced aperture ring