Astronomik H-alpha 12nm 2" (M48)
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | H-alpha 656nm |
| Bandwidth | 12 nm |
| Filter size | 2" |
| Mounted | Yes |
About
A 12 nm narrowband H-alpha filter for imaging HII regions from light-polluted or dark sites, blocking street lighting, airglow and most moonlight from UV through IR. The 12 nm width suits DSLR CMOS and CCD cameras with normal or high dark current and leaves more guide stars for integrated guiding sensors. MFR coating, 2" M48 mount.