New Refractor Coming What Filters Recommended ???
Posted 07 May 2013 - 09:07 PM
Posted 07 May 2013 - 09:48 PM
CN REPORTS: DGM Optics NPB Filter
For a good Oxygen III filter, I recommend the Lumicon OIII filter, although the Thousand Oaks OIII and DGM OIII filters aren't bad either. Clear skies to you.
Posted 08 May 2013 - 07:22 PM
Posted 08 May 2013 - 11:23 PM
Posted 09 May 2013 - 06:13 AM
Posted 09 May 2013 - 06:51 AM
Yellow helps with seeing polar caps on Mars. Not sure how much benefit there is in getting UHC if you already have OIII.
I use them both. An UHC filter has two advantages over the O-III. First, it passes more bands than just the O-III, I believe they also pass the H-beta filter so it can enhance objects that do not respond to the O-III filter.
Second, O-III filters take a toll on the stars visible something like M-8 shows a a lot of nebulosity but at the cost of stars in the cluster. An UHC filter shows more stars so it can make a nice balance.