Superb Konica Hexanon 45mm/1.6, 50 years old lens

2 pieces of Konica Hexanon 45mm/1.6 old lenses are prepared for modern use inviting SONY E-mount. Prior to the modification much deeper consideration was done to make use of the original functions as much as possible. Remaining straight helicoid focusing function is the task this time. As the superb performance of Hexanon 45mm/1.6 has been already known by preliminary trial shooting by myself, the work proceeded aggressively this time.
The relations between controlling ring and helicoid outer ring in combination with the infinity position was established without exaggerated efforts at all on SONY E-mount.
Residual problem to invite original straight helicoid function should be solved by some external parts setting, two ball bearings fixation for eliminating slipping resister on leading and trailing movement.
Putting a guiding pole on inner helicoid and supporting 2 ball bearings on the inside surface of the bayonet mount case. The slipping surfaces causes resister especially on this case, translating from rotating movement to sliding straight movement, this is why I determined to make use of miniature ball bearings here.
Avoiding Slip resistance and inviting Rolling resistance is worth doing, because the smooth feeling would performs compensation while the excitement and disorder in shooting scenery.
Now, the fundamental performance on SONY E-mount is establish with rotating helicoid function, straight is not yet. Just putting guide pole and 2 ball bearing so adequately would finish the work, that requires keen & precise concentration with shoulder stiffness.