Filter · MSRP $225
Antlia 4.5nm Narrowband Sulfur II (SII) EDGE Filter - 36mm Unmounted
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | SII 671.6nm |
| Bandwidth | 4.5 nm |
| Filter size | 36mm |
| Mounted | No |
About
A 4.5nm FWHM SII narrowband filter that carries the 3nm Pro series' OD5 blocking and transmission characteristics to a wider bandpass, rated for >90% transmission at 671.6nm and usable on systems as fast as f/3.