[Konvas] lens coating

[Steve Morton]

I'm fairly sure no camera techs actually do lens recoating. It is a very 
specialised job. Firstly the old coatings must be VERY carefully 
polished off without changing the curvature of the glass element, then a 
new layer or layers are applied to very tight tolerances generally in a 
high vacuum. It's not too hard finding companies that apply optical 
coatings, much harder finding optical technicians who can remove the old 
coatings

Cya
Steve