Astrodon - 50mm Unmounted Narrowband Square NII 3 nm Filter

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$1,438.00

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

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),

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SKU: ADO-NII3-50S