Agena 1.25" Starguider Dual ED Eyepiece - 18mm 1.25" eyepiece; 18mm focal length; 60 Apparent Field of view Fully multi coated optics; 5 lens elements in 4 groups Cost-effective alternative to expensive Orthoscopic and Plossl eyepieces Long eye relief of 18mm Rubberized body with retractable eyecups for optimum adjustment