SII 12nm CCD MaxFR Clip-Filter Nikon XL
Astronomik
From $329.95
3 stores
The Astronomik SII 12nm CCD MaxFR Clip-Filter is a narrowband emission-line filter optimized for imaging sulfur (SII) emission nebulae with Nikon full-frame cameras. Featuring the advanced MaxFR coating technology, this filter delivers exceptional performance with fast optical systems (f/1.7 to f/8), achieving at least 85% transmission at f/1.8 and 85% transmission even at f/1.4. The 12nm passband isolates the SII doublet at 671.7-673.0nm while blocking light pollution from sodium and mercury vapor lamps, making it ideal for both light-polluted urban skies and dark-sky sites, and enables creation of Hubble Space Telescope-like Hubble Palette images when combined with H-alpha and OIII filters.
Specifications
| Central Wavelength - Line 1 | 671.7 |
| Transmission at f/1.4 | 85% |
| Filter Type | Narrowband Emission Line |
| Coating Type | MaxFR |
| Optimal Focal Ratio Range | f/1.7 to f/8 |
| Bandwidth (FWHM) | 12 |
| Minimum Guaranteed Transmission | 90% |
| Camera Compatibility | Nikon Full Frame XL Clip |
| Transmission at Central Wavelength | 96% |
| Glass Thickness | 1 mm |
| Central Wavelength - Line 2 | 673 |