Explore Scientific 1.25" H-Alpha Filter 7nm

The Explore Scientific 1.25" H-Alpha 7nm filter is specifically designed for astrophotography, allowing to capture emission nebulae under artificially lit skies. This filter blocks almost all other colors, only letting through the hydrogen red emission lines. It effectively eliminates disturbing light from mercury and sodium vapor lamps, revealing invisible details to the naked eye and enabling photography of nebulae that appear completely empty without a filter. With a narrow bandwidth of 7nm, this filter significantly improves contrast and clarity of faint nebulae, even in difficult urban conditions. An indispensable tool for urban astrophotographers seeking impressive results despite light pollution.