Old Minolta Auto Rokkor 58mm/f1.4 obtained

I happened to bid on a old Minolta, Auto Rokkor 58mm/f1.4 with SLR period mount. Though some inconvenience on iris control, the selling price was only 2,150 yen finding out critical problem on the auto iris control pin distortion. It loses smooth movement on the iris controlling ring movement as a matter of fact.
Disassembling the base of the controlling pin base plate to correct the figure could make it possible to regain it's original physical property.
Applying some grease to at helicoid portin, it became like new as usual. No defect was observed on optical construction.
Specific smudge resolution on iris opened condition would show it's extraordinary performance on 33*44 image sensor.
I'm looking forward to inviting this Auto Rokkor 58mm/f1.4 (old Minolta) for fantastic photo shooting.