Space Arcade 1.25″ 2X Metallic Achromatic Barlow Lens

Double the magnification of each eyepiece you own with the 2X Barlow Lens. Keep the eye relief of your eyepieces while getting 2X the power Slides into 1.25 inch focuses and diagonals and accepts 1.25 inch eyepieces Fully multicoated optics with blackened edges for good light transmission and minimal reflections A Barlow lens is the astronomy accessory that keeps on giving! Insert it between your eyepiece and your telescope to get double the magnification instantly. A must for planet observations, Jupiter’s bands are visible better and Saturn’s rings are distinctly. Eye relief is the distance your eye has to be from the first lens in the eyepiece in order to see the full field of view. When you use a Barlow lens with an eyepiece, you get double the magnification, but the eye relief is not affected. This is a good thing, because normally the shorter the focal length of the eyepiece, the less eye relief you have. In other words, a standard 10mm eyepiece, as a general rule, will have better eye relief than a 5mm eyepiece. Bonus!