Details
Lumicon's Night Sky Hydrogen-Alpha Filters are long-pass filters with a 50% transition from blocking to passing at about 640nm. At wavelengths longer than 650nm, transmittance is 90% or above. The filter is used as an extreme anti light-pollution filter, and for contrast-enhancement of emission nebulae and other astronomical objects bright in the infrared.
Threaded for 82mm camera lenses.
Additional Information
| Manufacturer | Lumicon International |
|---|---|
| Model | LF3115 |
| Custom Stock Status | Call for Availability |
