Late last year I bought a Baader ultra narrowband 3.5nm h-alpha filter which I'm having a lot of success with.
I live in a fairly heavy light-polluted area and was hoping to jump across to full narrowband imaging i.e. OIII and SII.
So I started looking around and noted that the Baader ultra narrowband collection has a wavelength of 4.5nm for OIII and SII.
And there aren’t many reviews of the Baader 4.5nm range so I thought I'd ask here.
1. Does it make a difference if h-alpha is 3.5nm and OIII and SII are not?
2. Another and a slightly cheaper option is Antlia 3.5nm Narrowband OIII and SII. I know there are halos on the Antlia filters (see this post https://www.cloudyni...o-measurements/) and was wondering how the Baader stack up?
4. Does it matter if I mix and match filters i.e. Baader with Antlia as long as they are all approximately the same wavelength?
Ideally, I would love to have Chroma OII and Antlia SII to complement my Baader Ha but the price of the Chroma is just too much for me.
Looking forward to your inputs.