CANON EF 50mm f/1.0 L 鍍膜變質起霧拋光處理 Coating deterioration haze/fog polishing treatment

CANON EF 50/1.0 L 的鏡片有一個通病，就是光圈葉片前面的那一面鏡片的鍍膜會有變質起霧的問題，這種變質的霧是沒辦法擦拭清潔乾淨的，只能藉由拋光處理才能將變質層去除。
拋光處理之後，變質層被拋除，鏡片就恢復乾淨清透！

Coating deterioration on one surface of front internal glass is a common optical issue of CANON EF 50/1.0 L, and is just in front of the aperture blades. Deterioration makes the glass looks foggy and hazy, and is unable to be removed by general cleaning. The only way is to make a polishing treatment.
After the polishing treatment, the deteriorated layer has been removed, and makes the lens clean and clear again.