Astronomik HSO 6nm Filterset 36mm
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | H-alpha + SII + OIII (set) |
| Bandwidth | 6 nm |
| Filter size | 36mm |
About
The three Astronomik narrowband emission-line filters — H-alpha, SII and OIII, all at 6 nm — sold together as a set for Hubble-palette false-colour imaging. The 6 nm width suits faint objects in crowded Milky Way fields, low dark-current cameras and heavy light pollution. 36 mm round, with protective rings.