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

To demonstrate just one of the effects you will see

25” filters has 26 mm of clear aperture

who could ask for more

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