Filter · MSRP $390
Antlia ALP-T Dualband 3nm Ha&OIII Filter 2" Mounted
Key specifications
| Filter type | Narrowband |
|---|---|
| Passband | Ha 656.3nm + OIII 500.7nm |
| Bandwidth | 3 nm |
| Filter size | 2" |
| Mounted | Yes |
About
A dual narrowband filter passing H-alpha 656.3nm and OIII 500.7nm at a 3nm FWHM, built mainly for color cameras, with OD4.5 blocking of light pollution, moonlight and airglow; best on optics slower than f/4.