31mm Nagler Type 5 Eyepiece 2 Inch -
With the 31mm, the unique 6-element design using four exotic glasses, maintains the contrast advancement of the Type 4s while achieving a true field area 82% larger than the 22mm Type 4! Owners of fast Dobsonian/Newtonians can enjoy a larger true field, f
EN5-31 - TeleVue -