Zoom from low power to high power instantly with SVBONY SV135 1.25 inch zoom eyepiece. SV135 fully multi-coated zoom plossl eyepiece zooms to any focal length between 7 mm and 21 mm. Pick the best magnification for your object and enhance your view! SV135 zoom eyepiece has M28.5*0.6 threads on the bottom very convenient for connecting filter; compatible with 1.25-inch telescopes and accessories; works great for photography. 15mm long eye relief distance ensure relaxing observation and keep your eyes comfortable, especially for users who wear glasses; the rubber eye guard provides comfort and blocks unwanted stray light. Suitable for observing a variety of celestial targets. SV135 zoom eyepiece could bring you a better observation experience in a comfortable situation with high-contrast imaging; designed primarily for viewing lunar surfaces; jupiter and saturn; nebulae; clusters; and diffuse nebulae. 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 compatible with refractors, Celestron EQ, Meade Infinity and similar telescopes. It is not suitable due to the length reflectors for Newton. 1.25" Star Diagonal Mirror accepts 1.25" eyepieces filters and other accessories with a 1.25” insert barrel. Brass Compression Ring, provides a uniform pressure receiving area when holding the eyepiece; screw clamps effortless fixes more firmly and will not damage your eyepieces. High magnification for eyepieces to see more details of the moon; bands of Jupiter clearly; SVBONY 2x barlow lens is a better choice. 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. 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.