Filter · MSRP $360
Antlia ALP-T Dualband 3.5nm SII&H-beta Filter 2" Mounted
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | SII 672.4nm + H-beta 486.1nm |
| Bandwidth | 3.5 nm |
| Filter size | 2" |
| Mounted | Yes |
About
A dual narrowband filter passing SII 672.4nm and H-beta 486.1nm at a 3.5nm FWHM, built mainly for color cameras to pair with the ALP-T Ha&OIII filter for four-channel imaging, with OD4.5 blocking; best on optics slower than f/4.