Antlia PRO Ultra Narrowband 3.0nm H-alpha Filter - 50mm Unmounted 2 inch focuser telescope SV401 20-60x80 Spotting Scope

SV401 20-60x80 Spotting Scope

With a fully corrected field

they offer high transmission without color distortion

multiple star systems

Its long focal length and proven Plössl optical design make it ideal for observing nebulae

Antlia PRO Ultra Narrowband 3.0nm H-alpha Filter - 50mm Unmounted 2 inch focuser telescope SV401 20-60x80 Spotting ScopeAntlia 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