SVBONY Lens 34mm Wide Angle 72° Eyepiece using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings. The edges of the eyepiece lenses are blackened to minimize the scattering of stray light; the entire thread is matte to minimize reflections; enhance your viewing experience. SV136 telescope eyepiece's barrels threaded for use with 2" eyepiece filters (M48.5*0.75). The 34mm focal length lens are optimized to produce high contrast, high resolution, and superior flat field characteristics, always providing high contrast images; very comfortable for observation; suitable for viewing landscapes, bright astronomical observations, nebulae, etc. This 3x Barlow lens allows you to triple the magnification of any 1.25" eyepiece and deliver stunning image quality without adding a long reach between the telescope and eyepiece. The magnification of the Barlow lens is 3X, which can magnify the image without the Barlow lens by 3 times. You can see more details of the moon and planets, and the image is clear, making your observation more comfortable.