View Full Version here: : horsehead nebula filter
24-09-2010, 05:20 PM
what is the best 2" filter to view the horsehead nebula from sydney? i would be using a 20 mm nagler type 5 in a 12" Dob.
24-09-2010, 06:22 PM
H Beta filter. Lumicon make one but there are others. See http://www.lumicon.com/astronomy-accessories.php?cid=1&cn=Filters
You can get Astronomik locally from Bintel.
24-09-2010, 06:29 PM
Mark, apparently you need an H-Beta filter. I scored myself one a while back but haven't had a chance to try it out.
24-09-2010, 07:28 PM
ive an orion 2" h/beta nice filter
25-09-2010, 03:58 AM
I use an Astronomik H beta, it has allowed me to see the Horsehead from my outer suburban location with a 12".
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