Old Minolta Auto Rokkor SLR lens

I'm mentioning about old Minolta Auto Rokkor 55mm/f2.0 and Auto Rokkor-PF 55mm/f1.8 as shown in figs.

Simple comparison with single light source application from adequate angle shows similarity and identity on the lens design fundamental, 5 group and 6 element Gaussian construction.  Of course, the diameter of the most anterior frontal glass differs each other because of different F number, but setting the single light source on the symmetric position, some surprise occurred in my mind. Almost exactly the same reflective surfaces exist though some coating density discrepancy is observed between them.

A few days ago, both of them were obtained through Yahoo auction at the cheapest prices including another Minolta faster lens Auto Rokkor 58mm/f1.4, marble-like gem so called because of optical property that appears around fully opened iris condition, bleeding phenomena that cannot be seen in recent designed modern models. But for this physical property, some specific resolution cannot be explained. Utilizing this extraordinary characteristic would play very important part of fantastic, passionable and deeply impressive, some photographic artists might control this hidden potential with pleasure. This is where the joy of only a few photographer who know the historical background of Minolta can be found. The world exists in different dimensions from so to speak----"resolution and contrast", also differs from "Kante theory" by Ernst Leitz company.

Consequently, I spent time to maintain three Auto Rokkors, fully disassembled for cleaning and circle edge black coating application, it goes without description that helicoid and it's straight movement guide groove rublication. Remember that old Minolta SLR lenses from Auto Rokkor to MC models accept relatively easy access to disassembling and maintaining that are required so periodically to remove mist and mold fungus, but later MD model refuses periodical maintenance because of it's lens supporting fuselage design, not metallic but with engineering plastic one piece molding method leading to "Non-degradable structure", how come?

All three Auto Rokkors are accepted on 33*44 image sensor, so I'm looking forward to obtaining brilliant result.