Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Replacement Parts Download Celestron’s Starry Night Software

Download Celestron’s Starry Night Software and learn about the night sky

this compact device will help you locate popular night sky objects

The bottom panel is reinforced with a hard layer of PVC for extra protection from minor bumps and to provide a sturdy bottom

Eye relief: 15 - 18mm

you will receive the straight version

Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Replacement Parts Download Celestron’s Starry Night SoftwareThis 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