Pegasus Astro Photographic Filter - SII 2'' mounted Filter (PEG-FLTR-2M-S2)

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.

Technical Specification

• Specifications
  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

In the Box

Filter

Manual & Warranty

Pegasus 1-Year Warranty