Baader Planetarium Colour Filter Red
Key specifications
| Filter type | Other |
|---|---|
| Passband | Red RG 610 (≅ W25) |
| Mounted | Yes |
About
A fine-optically polished red (RG 610) planetary colour filter (≅ Wratten 25) with 7-layer Phantom Group AR coating on both sides and 98% long-pass transmission, mounted in a blackened aluminium cell threaded on both ends; sold in 1¼" and 2".