Levenhuk Ra H-Beta 1.25'' Filter
Filter for observations of deep-sky objects. Barrel diameter: 1.25'' Levenhuk Ra H-Beta 1.25'' Filter is perfect for observation of nebulae due to its capability to suppress all light that lies outside its 4720 Å to 4850 Å (472-485 nm) passband. This filter is highly recommended for observation under urban city illumination. This filter is able to suppress light pollution and enhance the contrast of the view. It has a barrel diameter of 1.25'' so you can use it with any type of telescope.