Hexanon 40mm/2.8

Konica Hexanon 40mm/2.8 50 years old lens has activated on SONY alpha 7 digital format yesterday, unexpectedly it waked up and must be frightened so much. Without distorting from my imagination, this triplet lens played well with some expected performance.
Though this small has a tendency of vignetting so naturally, the sharpness and resolution at center position are superb enough to satisfy my requirement. It would be brought around everywhere I go from now, lighter and smaller the better. Without writing here, Carl Zeiss Sonnar 85mm/2.8 also over 50 years ago played well, with no complaint, perfect performance.