Levenhuk Ra H-Beta 2'' Filter
Filter for observations of deep-sky objects. Barrel diameter: 2'' Levenhuk Ra H-Beta 2'' Filter is a perfect filter for deep-sky observation under urban city illumination conditions. This filter is able to suppress up to 90% of city lights and has a passband of 4720 - 4850 Å (472-485 nm). Levenhuk Ra H-Beta 2'' Filter enhances the contrast of observed objects and makes skies darker. It has a barrel diameter of 1.25'' so you can use it with any type of telescope. It is also a great accessory if you want to try your hand at astrophotography - this filter provides high-contrast images of exceptional quality.