Peaky-B
Active member
Peaky-B
If one is at all worried then I would not use anything without consulting the maker.
However, Minox might not know themselves as I think the firm has changed hands and maybe don't make any binoculars themselves.
If they do still manufacture then ask the head of optics.
Leica should know as they make binoculars themselves.
So would Zeiss or Swarovski.
I always try to go straight to the top when asking these questions as sales personnel may not know.
Modern coatings are supposedly harder than the glass that is coated.
Usually the outer glasses are harder than inner glass elements.
However, the modern extra coatings that repel water may not be so forgiving.
It may be this is why alcohol is suspect.
I don't know what nanocoating is, so cannot comment.
Thanks Binastro I'll make contact with Minox