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Following Tele Vue's philosophy of pushing the state of the art, long-time Tele Vue employee and optical design protégé Paul Dellechiaie took up the challenge and designed the basic eyepiece form. Under Al's guidance, Paul tweaked his design to fulfill the original goals.
While sharpness is inherent to the optical design, contrast is maximized through the intelligent use of flat finished baffles and ultra low reflectance, high efficiency coatings tuned to the composition of each element.
Introduced at the 2007 Northeast Astronomy Forum, Tele Vue once again broadened the amateur astronomer's perspective on the universe with: 100° of pure Tele Vue quality. The field area of this new eyepiece is more than 50% larger than an 82° field. The Tele Vue Ethos is essentially multiple eyepieces, delivering the true field size of a longer focal length, narrower apparent field eyepiece with the benefits of higher power and darker sky background.
TeleVue invited NEAF attendees to take a look and see the universe the way they think it was meant to be experienced, with a field of view incredibly wide and sharp! They were very pleased indeed by the response and validation of their design goals.
The 10mm is parfocal with the 13mm ETHOS.
Its 59mm rubber grip diameter makes this model usable in binocular viewers — for most people.
|Focal Length (mm)||10|
|Barrel Size (in.)||2" & 1¼"|
|Apparent Field of View (deg.)||100|
|Eye Relief (mm)||15|
|Weight (lb / oz)||1.10 / 17.6|
|Field Stop (mm)||17.7|