Established in New York in 1977, Televue is the worlds foremost eypiece manufacturer. Introduced in the early 80's the TeleVue "Nagler" eyepiece was the first to offer a super wide flat field with very low distortion. Since then Televue Eyepieces have continually developed, giving rise to the latest "Ethos" design, which offers a 100 degree field of view. The edges of the field seem to dissapear - an immersive experience known to many as the "spacewalk" effect.