Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 (Pre-owned) Mounting Rings the Starfield Tri-Pier 1000B is

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

effectively making the sensation of looking through binoculars vanish

actual filter performance may vary in the field based on several factors

but sometimes the scene is too dark or too bright

Metal head with coarse focusing knob

Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 (Pre-owned) Mounting Rings the Starfield Tri-Pier 1000B 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