Anyone got any impressions of these Baader Neodymium filters (on sale at "telescope planet"). Seem really cheap and show good results. To good to be true?
The Neodymium is a moon and skyglow filter, which is fine if that's what you want but only improves contrast across the normal spectrum compared to an unfiltered view. If you're looking for a true narrowband filter in the Baader catalog then what you need is either the general use UHC-S Nebula Filter (Ha, Hb, OIII) or the more specific O-III Narrowband Filter.
John
Better that old people should die of talk than to have young people die in war.
  