Pegasus Astro Photographic Filter - SII 2" Mounted Filter

Starting Price: $246.00
Price as Configured: $246.00
Brand: Pegasus Astro / SKU: PEG-FLTR-2M-S2
Pegasus Astro has developed 2-inch mounted deep space photographic filters for broadband and narrowband usage.
Price as Configured: $246.00
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Sulfur II (SII) filters are a narrow-band-filters for CCD/CMOS photography. This extra narrowband SII CCD 7nm filter is designed for nebula observation allowing 12nm bandwidth of light centered on a wavelength of 672nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, high and low pressure sodium vapor lights, and the natural light caused by neutral oxygen emission in our atmosphere (i.e., skyglow). The filter only lets the light of the ionized sulfur pass and blocks the rest of the visual spectrum.

Filter Size: 2 inch
Polish: 1/4 wavefront, Parfocal
Transmission Range: T > 80%, 627 nm, 7nm FWHM
Coatings: Multilayer Anti-reflection
Type: Narrowband (7nm)
Shape: Round
Thickness: 5mm (filter) + 2.5mm (thread)
Thread: M48, 0.75 pitch