LEICA SUMMICRON-M 35mm f/2.0 pre-A IV 七枚對焦環螺紋重新潤滑 7-element Re-lubricating the focusing helicoids

Leica M35/2 pre-A 七枚 對焦環(螺紋)重新潤滑
這支七枚對焦環轉動手感生澀不順，將原本螺紋上的油徹底清除乾淨，再上新的潤滑油脂，充分潤滑後重新組裝。這算是基本保養的一部份。

Leica M35/2 pre-A re-lubricating the focusing helicoids.
The focus ring of this lens turns quite stiff and need a re-lubrication to its focus helicoids with fresh grease. This is a part of basic maintenance.