Tele Vue is known for its in-house eyepiece and telescope designs by Al Nagler; our latest eyepiece brings new meaning to the term in-house. The concept for this eyepiece was first proposed by Tele Vue President David Nagler with performance parameters giving it the fundamental characteristics (the ethos) of a Tele Vue eyepiece: high contrast comfortable eye relief and full field sharpness. Control of astigmatism field curvature lateral color angular magnification distortion correction and low pupil sensitivity for daytime use were specified criteria. Following Tele Vues philosophy of pushing the state of the art long-time Tele Vue employee and optical design protg Paul Dellechiaie took up the challenge and designed the basic eyepiece form. Under Als 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. At the 2007 Northeast Astronomy Forum Tele Vue once again broadened the amateur astronomer's perspective on the universe and introduced a new observing experience; 100 of pure Tele Vue quality. With a 13mm focal length evoking the original Nagler revolution 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.The 21mm focal length completes the logical set of 21mm/13mm/8mm and nicely juxtaposes the 17mm/10mm/6mm combination. Each step within these two sets approaches a 3x field area gain. The 21mm's effective field stop diameter is 36.2mm bringing its true field close to the 35mm Panoptic (38.7mm Field Stop diameter). Its true field is also larger than
