Levenhuk Ra H-Beta 2'' filter is used for observations of deep-sky objects, such as emission nebulae (H II) and others. This filter greatly enhances the contrast of observed objects and suppresses up to 90% of light, so it is perfect for urban stargazing. This filter suppresses light pollution, making skies darker as a result. Levenhuk Ra H-Beta 2'' filters have a barrel diameter of 2''.
This filter has a passband from 4720 ? to 4850 ? (472-485 nm) and may be used for stargazing and capturing high-contrast images during astrophotography sessions.
|Dimensions||3.1×1.2×1.2 in. (8.0×3.0×3.0 cm.)|