62° aspheric eyepiece set, suitable for 1.25 inch /31.7mm astronomical telescope. - Fully multi-coated glasses for excellent image contrast and light transmission. - The eyepiece of high-definition, it can increase the magnification of the telescope combination. - 62° aspheric field of view.Eyepiece interface recess portion can prevent the loss. Specifications • - Focal Length : 23mm, 10mm, 6mm or 4 mm • - Field of View 62 Degree • - Coating Optical Lenses, Fully Coated, High-definition • - The Structure of the Optical System Aspheric Eyepiece • - ColorBlack+Yellow+Silver