As far as I'm concerned, I don't care who makes NF glass! All I know is that it is an excellent glass/scope. NF has many attributes that make it a fine quality scope. I saw one in a gunsmiths shop that had a HUGE dent in the ocular bell, but the glass and mechanisms still were intact. He did not know how it happened, but we were both highly impressed. I own an embarrassing number of NF scopes and bought many on this web site. I've owned Swaros, Leupolds, Vortexs, and Zeiss, among others. Only the little 10 power Zeiss comes close to equaling NF quality.