2" mounted photographic filter - S2 7nm
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Details
Extra narrowband SIICCD 7nm filter (Sulful II for CCD) is designed for nebula observation allowing 7nm 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, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)
Specifications
| SKU | PEG-FLTR-2M-S2 |
| Filter Size | 2 inch |
| Polish | 1/4 wavefront, Parfocal |
| Transmission Range | Tave>80% 672 nm, 7nm FWHM |
| Coatings | Multilayer Anti-reflection |
| Type | Narrowband (7nm) |
| Shape | Round |
| Thickness | 5mm (filter) + 2.5mm (thread), glass thickness is 2mm |
| Thread | M48, 0.75 Pitch |
Materials + Care
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Extra narrowband SIICCD 7nm filter (Sulful II for CCD) is designed for nebula observation allowing 7nm 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, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow)
| SKU | PEG-FLTR-2M-S2 |
| Filter Size | 2 inch |
| Polish | 1/4 wavefront, Parfocal |
| Transmission Range | Tave>80% 672 nm, 7nm FWHM |
| Coatings | Multilayer Anti-reflection |
| Type | Narrowband (7nm) |
| Shape | Round |
| Thickness | 5mm (filter) + 2.5mm (thread), glass thickness is 2mm |
| Thread | M48, 0.75 Pitch |
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