Agena 1.25" Starguider Dual ED Eyepiece - 5mm 1.25" eyepiece; 5mm focal length; 60 Apparent Field of view Fully multi coated optics; 5 lens elements in 3 groups Cost-effective alternative to expensive Orthoscopic and Plossl eyepieces Comfortable eye relief of 15.8mm Rubberized body with retractable eyecups for optimum adjustment