LEICA TRI-ELMAR-M 28-35-50mm f/4.0 ASPH. E49 鏡片清潔、移焦調焦、修復變焦不順暢 Cleaning, Adjusting and Fixing

這支 Leica Tri-Elmar-M 28-35-50mm f/4.0 ASPH. E49 三焦鏡的鏡片有點髒、連動對焦有移焦的問題，以及焦段切換環的轉動不順暢。 透過正確的處理方式，以上的問題都可以解決

This Leica Tri-Elmar-M 28-35-50mm f/4.0 ASPH. E49 had 3 major problems~

1, The internal lens elements were not clean that need to be cleaned.

2, It had focus shift in rangefinder coupling focusing under 28, 35 and 50mm focal lengths that need to be  adjusted repeatedly and carefully calibration.

3, The action of the focal length selection ring was not smooth that need to be repaired