SVBNOY H-Alpha 7nm 1.25" Filter Narrowband Astronomical Photographic CCD Filter For Sale
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SVBNOY H-Alpha 7nm 1.25" Filter Narrowband Astronomical Photographic CCD Filter :
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SVBNOY H-Alpha 7nm 1.25" Filter Narrowband Astro deep sky photography CCD Filter
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Because H-Alpha is 656nm mainly through the high permeability of the spectrum, and 656nm spectrum of the color presented by the red-based, 300-1100nm cut-off depth to get the details of the launch nebula richer. Extremely narrow bandwidth allows only the 656nm band to pass through the filter, can effectively cut off the artificial light Na lamp and Hg lamp interference to make the transmission line through, so as to improve the nebula contrast. With CCD is better choice for deep sky photography and wide-field astrophotography.
On Jan-13-20 at 18:26:08 PST, seller added the following information: