Astrodon - 50mm Unmounted Narrowband SII 5 nm Filter

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$870.00

Availability: This Item Will Be Available in 2-3 Months

When it comes to Narrowband filters, no one knows more or does it better than Don Goldman of Astrodon Filters. Narrowband (NB) filters enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII, 501 nm), sulfur (SII, 672nm) and others.

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SKU: ADO-SII5-50R