Hi all !

I have a newly bought 50w Laser from China (Jinan).
When I first cleaned the focal lens I saw that the golden coating
on the lens had greyish hue on it. I cleaned it with pure alcohol
and a lens tissue from Canon. Then I saw that some of the coating
had rubbed off. Today the coating is almost all gone but the Laser
seems not to ne affected by it.

What is this this coating for ?

Should I buy a new lens ?


In hope of a quick answer...

Einar Kolbeinsson
Husavik, Iceland

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