Tele Vue 5mm Nagler Type 6 Eyepiece - 1.25" - EN6-05.0 Ethos Eyepieces Effective Field Stop: 21

Effective Field Stop: 21

Fits all standard 1

BaK-4 prisms and fully multi-coated optics utilizing Celestrons proprietary XLT coating technology

When it comes to outright optical quality

Tele Vue 5mm Nagler Type 6 Eyepiece - 1.25" - EN6-05.0 Ethos Eyepieces Effective Field Stop: 21About the TeleVue 5mm Nagler Type 6 Eyepiece 1. 25" The 7 element, TeleVue 5mm Nagler Type 6 Eyepiece design is based on the original patented Nagler TeleVue Telescope Eyepiece 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