Televue has the ambition to build the best eyepieces for all purposes. Therefore, several variants on the market. Nagler and Ethos are optimized for the glasses Deepskybeobachtung with fast Newtonian systems.
The Nailers are the classics, with 82 degree field of good and superior edge correction. Especially enjoyable are the eyepieces on Dobson. Because of the large field must not be adjusted as often.