Posted by Robin Vann at 20:07 on 2010 Aug 13
Thanks David, I shall go ahead with a #80A from one of those.The only reason I’m using IR cut is that the Baader Neodymium Moon & Skyglow has IR cut. I find this filter very good for Moon glow, but also for helping eliminate sodium light pollution (which I have to the west, from Birmingham, which is about 25 miles away); the filter pretty much rejects 589-590nm. It is actually very effective. It also seems to darken the reddish areas on Jupiter, though I hope a #80A will be more effective in this regard.