Lanthanum Eyepieces A Vixen-designed A Vixen-designed eyepiece that uses low-dispersion Lanthanum glass. 3-group 5-element lenses or 4-group 7-element lenses Extra-long 20mm eye-relief allows comfortable observation even with glasses and is prized for eyepiece projection imaging Excellent field-of-view virtually eliminating ghosting and flare Fold-down rubber eyeguards Fully multi-coated
