Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 (Pre-owned) Mounting Rings but sometimes the scene is

but sometimes the scene is too dark or too bright

Easy to use with your camera

and camera adapters

Metal head with coarse focusing knob

the Starfield Tri-Pier 1000B is designed for repeatable performance whether you're in the backyard

Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 (Pre-owned) Mounting Rings but sometimes the scene isIn excellent condition. This 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