- Transmission of nearly 100% of both OIII lines
Complete blocking of all extraneous wavelength coverages The ideal filter for telescopes 10 " (25cm) and larger
Main operational use: Planetary nebulas & super nova remnants
No moisture-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
Completely resistant against high humidity, scratches and aging effects
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