Which H-Alpha filter

[04Stefan07]

I am in the market for an H-Alpha filter for my setup. Thinking about either the Astronmik 6nm or 12nm 31mm. 

I know there is a price difference and is it right that the 6nm is better for more light polluted areas as it doesn’t let as much light in?

Any advice would be great!

[ollypenrice]

I would strongly recommend the 6nm over the others. It will block more moonlight and other LP if you have it, give you smaller stars and higher contrasts. Personally I use a Baader 7, an Astrodon 5 and an Astrodon 3.  I don't find the Astrodons to need longer exposure. Rather the reverse if anything.

Olly

[Gina]

Astrodon 3nm for me every time - you need deep pockets though!  But boy!!  Do they perform!!

[04Stefan07]

Yeah I had a look at the Astrodons but holy crap that is way out of my price point. The Astronomik 6nm looks to be a good price. I am currently using 31mm filters.

If money was no object I would go all out and get 2" but I need to draw the line somewhere!

[DaveS]

Chroma aren't quite so ruinously expensive, but still un-cheap.

[newbie alert]

I use a Astronomik 6nm   I've been more than happy with it