Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Bresser Optical Tube Info Optical Design

Optical Tube Info Optical Design Schmidt-Cassegrain Aperture (mm) 203

a feature that sets it apart from competitors

3 SCT Focal Reducer Specifications

25” filters has 26 mm of clear aperture

Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Bresser Optical Tube Info Optical DesignThis very narrowband 3 nm SII filter from Antlia is part of their Pro series and comes in a 2" threaded filter cell that is designed to be screwed on to the 2" receptacle of your astrophotography accessory, including a 2" filter wheel or filter drawer. Antlia 3nm Pro Series Sulfur II Filter 2" Mounted This Antlia SII Pro narrowband filter optimizes the FWHM (full width half maximum) to a 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro