Antlia Edge 4.5nm filters

[MarkInSpace]

Does anyone have experience with the Antlia Edge 4.5nm NB filters? Not much about them on the net, I’m specifically looking at their halo characteristics…

[joshman]

I have the 36mm unmounted filter in 4.5nm for Ha, and 3nm for Oiii and Sii.I went with the 4.5nm for the Ha as this should also picks up the Nitrogen line.



My experience has been incredibly positive. None of my Antlia Filters shows evidence of halo, though I haven't had reason (yet) to point them at any particularly troublesome stars. I plan on doing some Horsehead nebula images once its up at a better time of night, so I'll get to see if or how bad Alnitak halo's. I also plan on grabbing some Witchhead nebula, so i'm keen to see how badly the off-axis light from Rigel interferes as well.