Astronomik SII 12nm 2" (M48)
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | SII 671.7 + 673.0nm |
| Bandwidth | 12 nm |
| Filter size | 2" |
| Mounted | Yes |
About
A 12 nm narrowband filter isolating the sulphur-II lines at 671.7 and 673.0 nm, blocking sodium and mercury 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.