[PlanetMan]

I think the exact word was "follow" not 'copied' as you stated. Given that the existence of the Naglers came first and both brands employ an optical design that neither manufacturer actually invented then I think the earlier comment is correct.

Please don't misunderstand me - I personally think there is a lot of hype with Televue Eyepieces and many other brands are just as good or better but at half the price - Vixen is a perfect example of this so I am glad they are making these eyepieces and the reference to Nagler is merely a way of recognising this new range of Vixen EP is a 80+ afov