I bought one of the late ones and has a violet not red coating.Unfortunately, for my situation, Zeiss had changed the coating at some late point. (I don't mean the Lotutec addition.) So since then, the coating has a reddish-orange shine that can irritate when illuminated from behind the observer. It's particularly a problem when wearing eyeglasses, I think. It is much more comfortable with the violet version they had before. I still hope to find a very good (only slightly used) model. Would not need Lotutec.