Re: First images with AP1200 GTO

Roland Christen

In a message dated 6/20/2007 8:00:49 PM Central Daylight Time, writes:

do all H-alpha filters cause halo (i'm looking to buy one and was
thinking about getting the astrodon). what h-alpha filter would you
recommend ?
I use the Baader 2" filter now. It does not cause any halos.


See what's free at

Join to automatically receive all group messages.