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Parfocal Filters: All Astronomik Filters are Parfocal
to ensure scratch resistance and stability on the central wavelength
Designed for eyepiece use rather than imaging
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Antlia 4.5nm Edge Filters Size:SII 50mm Parfocal Filters: All Astronomik FiltersAntlia 4. 5nm EDGE Filters (H alpha, SII, OIII) Overview Antlia 4. 5nm EDGE Filters are engineered to overcome the challenges of conventional narrowband filters, which often experience significant transmission loss due to Central Wavelength (CWL) shifts. With a guaranteed transmission rate of over 90% (T>90%) within a 1nm range of the central bandwidth, Antlia 4. 5nm EDGE Filters deliver outstanding performance for both long focal ratios and fast
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