Quote:
Originally Posted by White Rabbit
Hi guys.
I picked up a 6nm Ha filter from bintel the other day. I actually went in for the 12nm but they offered me the 6 for a good price so I took it. Have done no research on the 6 before buying it, I'm now reading that combining the 6nm with other narrow band images can be very difficult. Astronomik even stage on thier site that the 12nm is better for this purpose. Does anyone have any real experience with this filter?
Should I have bought the 12 as my original purpose was to combine with other narrow bands?
Thanks
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I don't see why it would be a problem. A lot of people, myself included, are successfully using 3nm Ha filters with wider OIII and SII filters.
Very narrow filters may not work as well with very fast optical systems but I wouldn't worry about that unless you're at f/3 or less.
There's some good info here:
http://www.astrodon.com/Orphan/astrodonfaqnarrowband/
Cheers,
Rick.