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The Ion Gun Assisted Deposition coating on a double-sided polished substrate ensures minimal internal reflections and flat-top bandpass performance
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they offer high transmission without color distortion
Antlia PRO Ultra Narrowband 3.0nm H-alpha Filter - 50mm Unmounted 2 inch focuser telescope The Ion Gun Assisted DepositionAntlia PRO H Alpha (Ha) 3. 0nm Ultra Narrowband Filter 50mm Round Unmounted (glass only) Antlia H alpha Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia H alpha 3nm Pro filters are designed to deliver 88% transmission at the 656. 3nm line which provides you with the
