Baader Planetarium Colour Filter Orange
Key specifications
| Filter type | Other |
|---|---|
| Passband | Orange (≅ W21) |
| Mounted | Yes |
About
A fine-optically polished orange planetary colour filter (≅ Wratten 21) with 7-layer Phantom Group AR coating on both sides, mounted in a blackened aluminium cell threaded on both ends; sold in 1¼" and 2".