More magnification for existing eyepieces to see the details of moon and bands of Jupiter clearly;the Barlow lens is a must NOTE,Each telescope has its own maximum capability of the telescope optics.And after the maximum, image get blurred.The Maximum usable magnification is usually twice the aperture of a telescope. For example,you get a 60mm aperture telescope ,then the maximum usable magnification is 120x. Features: When the Barlow lens and eyepiece using together;if the magnification is over the biggest magnification;the Barlow lens observation effect appears nearly zero or imaging becomes blurred In order to reduce the influence of imaging;careful selection of Barlow lens at different magnification is very important. The 1.25-inch Plossl eyepiece is suitable for observing nebulae, star clusters, comets and other low-light, dim celestial bodies. The field of view is transparent and bright, and the observation is comfortable. The exit distance of 19mm is convenient for customers to observe for a long time. With the true FMC full broadband multilayer coating, it ensures that each glass surface has multiple layers of coating to for a better image quality. Standard Plossl eyepiece structure: 2 sets of 4-piece optical structures The edge of the lens is matt blackened to prevent stray light interference All-metal mirror structure, fine texture, fine workmanship, and humanized environmental protection rubber anti-slip ring design will prevent accidental depression.