Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Replacement Parts also allows connection of optional

also allows connection of optional accessories PC port: USB 3

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

iOptron has added features for convenience and functionality

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

28") Diopter Adjustment Range: ± 2 Twilight Factor: 12

Antlia 3nm SII Pro Series Filter - 2" - SII-PRO-3NM-2 Replacement Parts also allows connection of optionalThis 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