- Transmission of nearly 100% of the H-beta line
Complete blocking of all extraneous wavelengths
Main operational use: Hydrogen Nebulae
No moisture (humidity) sensitivity, no aging, and totally scratch-proof
Excellent carrier material - substrate is optically polished. The optical performance (resolution & contrast) of your telescope is not reduced in any way by the filter.
Parfocal with other Astronomik filters
Glass thickness: 1mm
Diffraction limited, the filter will not reduce the optical performance of your telescope!
Astronomik filters are delivered in a high-quality, long lasting, filter box