Chroma H-Alpha 5nm Narrow Band Filter
The Chroma H-Alpha 5nm Filter is essential when imaging objects rich in ionised hydrogen, works well in light polluted areas and when the moon is up.
At 656.3nm, a narrow-band emission filter is required to separate H-Alpha from the SII doublet (671.6nm and 673.1nm).
Wavelength (CWL): 656
Bandwidth (FWHM): 5
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