The Pegasus Astro Narrowband Imaging Filters offer 2-inch mounted photographic filters. These filters are designed to reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in the atmosphere (i.e. skyglow).
The Ha7n narrowband filter has a 7nm bandwidth of light centered on a wavelength of 656nm. It is a good choice for a narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details.
The OIII-CCD 7nm filter is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 500nm. The Extra narrowband SIICCD 7nm filter (Sulfur-II) is designed for nebula observation allowing 7nm bandwidth of light centered on a wavelength of 672nm through.
The Pegasus Astro Narrowband Imaging Filters specifications include:
– Filter Size: 2 inch
– Polish: 1/4 wavefront, Parfocal
– Coatings: Multilayer Anti-reflection
– Thickness: 5mm (filter) + 2.5mm (thread)
– Thread: M48, 0.75 pitch
You can learn more about the Pegasus Astro Narrowband Imaging Filters here.
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