LEICA APO-TELYT-M 135mm f/3.4 對焦環重新潤滑 Re-greasing the focusing helicoids

這支LEICA APO-TELYT-M 135mm f/3.4 的對焦環轉動有些不順，將對焦組件全部拆解清洗後，上新的潤滑油脂 重新潤滑

The focusing ring of this LEICA APO-TELYT-M 135mm f/3.4 does not work smooth and need a re-greasing. After fully taking apart the the focusing parts and thoroughly cleaning, then applying a proper grease to make it smooth.