Astronomik ProPlanet 742 1.25" (M28.5)
Key specifications
| Filter type | Other |
|---|---|
| Passband | 742-1100nm (IR pass) |
| Filter size | 1.25" |
| Mounted | Yes |
About
An infrared pass filter that transmits only beyond 742 nm, where seeing disturbs the image far less than in visible light — aimed at lunar and planetary imaging, especially Mars, with 6" and larger telescopes. It also darkens a twilight sky enough to shoot planets in daylight, and gives striking Wood-effect results in IR nature photography. 1.25" M28.5 mount.