ANTLIA SII 4.5nm EDGE NARROWBAND FILTER Size:1.25" For older SkyWatcher mounts such

For older SkyWatcher mounts such as the EQ6

With liquid cooling you can get to -45C below ambient with normal temperature liquid

SkyWatcher SolarQuest

AZ Mount Pro/MiniTower/MiniTower Pro (need Star Knobs with Center Post 8340-PIER)

ANTLIA SII 4.5nm EDGE NARROWBAND FILTER Size:1.25" For older SkyWatcher mounts suchThe Antlia S II 4. 5nm Edge narrowband filter has the same excellent transmittance characteristics as their 3nm Pro series but at a more affordable price. The 4. 5 nm bandpass is only 1. 5% of the entire visible spectrum, increasing the signal to noise ratio and delivering high contrast images and extremely dark backgrounds. To even further enhance the contrast, and suppress the stray light and internal reflections, Antlia applies edge blackening