Filter · 2021–
Optolong H-Alpha 3nm 36mm
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | Ha 656 nm |
| Bandwidth | 3 nm |
| Filter size | 36mm |
| Mounted | No |
About
3 nm H-alpha narrowband imaging filter centered on 656 nm, part of the SHO-3nm kit; 36 mm unmounted.