Nebula Filter H-Alpha 2-inch 12nm

From a city or suburban backyard, light from streetlights brightens the sky and buries the faint red emission nebulae a camera could otherwise record. The Explore Scientific H-Alpha filter's 12 nm passband lets only hydrogen's emission line through, blocking almost all artificial light, mercury and sodium vapor lamps included, so many of those nebulae appear in full extent on the image.

Key Features

• 12 nm passband at the hydrogen-alpha line, 656.3 nm.
• Blocks almost all artificial light, including mercury and sodium vapor lamps.
• Individual test report supplied with each filter.
• For photography only. Explore Scientific developed it for astrophotography; it is not for visual use.

Ideal For

• Urban and suburban astrophotographers under a slightly brightened sky, the conditions Explore Scientific names for this 12 nm filter.
• Emission nebula imagers adding a hydrogen-alpha channel with a 2-inch filter.

Accessories & Compatibility

Explore Scientific also makes this 12 nm filter in a 1.25-inch size. For heavily brightened skies, it makes a 2-inch version with a 7 nm passband.