
TeleVue Nagler Eyepiece The 7-element Nagler Type 6 design is based on the original patented Nagler design. This new 7-element design update for the short focal length Nagler deserves its own designation. Using different exotic materials coating processes and design ingenuity Al has massaged more eye-relief contrast and true field of view into the shorter focal length Naglers while maintaining the absolute sharpness of the originals. Eye-relief is 12mm on each model and all are sized about the same as the original 7mm! Weight about 0.4 to 0.5 lbs. Available in 13mm 11mm 9mm 7mm 5mm 3.5 and 2.5mm focal lengths.