SVBONY 68 degree ultra wide long eye relief eyepiece with a comfortable wide field for planetary observing,Super wide 68 degree apparent field offers expansive views of the moon;star clusters;and the Milky Way. It can be used in any astronomical telescopes that fits for standard 1.25" eyepieces. 68 degree ultra wide FOV Comfortable ultra-wide field, get bright and sharp viewing. Fully multi coated lens without introducing additional chromatic aberration; make image more sharper. Broadband green film optical glass. Chromatic corrected; Soft rubber eye guard Fold down soft rubber eye guard is more comfortable for eyeglass wearers Specifications:Structure design:4-elements in 3 groups (9mm) Eyepiece series:68 degree ultra wide eyepiece Focal length:9mm Barrel size:1.25" (31.7mm) Eye relief:17mm Apparent field of view:68 degree Lens material:optical glass lenses Body material:fully metal Filter threads:standard 1.25" filter thread Package includes: 1xSVBONY 1.25" ultra wide 15mm eyepiece 2xSVBONY lens cover. High magnification for eyepieces to see more details of the moon; bands of Jupiter clearly; SVBONY 2x barlow lens is a better choice. Completely multi-coated and pure optical glass lens for optimum image brightness high contrast.Clear and bright images can be obtained for moon, stargazing, etc. Cemented doublet optic structure reduce the chromatic aberration with the increase of magnification. With T/T2(M42x0.75mm) male thread for T/T2 connectors. Barlow lens has a T mount adapter so you can attach a DSLR camera with an available T-mount. The SVBONY fully metal 1.25" Mirrors Diagonal zenith mirror offers an upright figure which is but turned backward in left and right position. The mirror is suitable for refractors, Celestron EQ, Meade Infinity and similar telescopes. It is not suitable due to the length reflectors for Newton. 90 Degree Comfortable Observation. It can be used to observe objects with comfortable angle as you observe from above.