Wow, this is my first post and I'm already glad I found this group! Thanks so much for everyone's input! After reading all of the feedback, and especially Louis' last comment regarding an Urban Sky Filter, maybe that's my better choice? I have somewhat polluted skies (south of Atlanta) and am looking for something that gives me better views of the targets I normally have a hard time finding and seeing well. I've read good things about the O-III filters and thought that might be my next best buy, but maybe an Urban filter would be more practical? Or even a better UHC than I have now, maybe the Baader UHC-S Nebula filter? https://www.telescopesplus.com/collections/telescope-accessories/products/baader-planetarium-uhc-s-nebula-telescope-filter Penguin ears... that one got me!! Good analogy though!
Thanks Ronin! The UHC I received just came as the filter itself, no documentation with it. I may have to google it and see if Zhumell may be has those specifications on their own website, thanks for the tip!
Thanks to you both! And thanks for the link to the filter article, I have it pulled up now. I have noticed M31 does look best naked-eye rather than through any of my filters, was curious if O-III helps with those as well. I am a bit of a cheapskate and am trying to keep the cost below my fairly small bonus money (LOL), was looking at the Zhumell HP O-III filter or the Celestron O-III Narrowband filter. The Celestron sounds like a better filter from what I've read, but I'm not sure. Thanks so much for the help!
I currently have an ultra high contrast filter - Zhumell High Performance UHC - and have had some luck seeing additional features in larger objects while using it. I was thinking about purchasing an Oxygen-III filter also, but wonder just how different is the O-III compared to the UHC? Is it worth the money to have both in my filter collection? My scope is only a 130mm, and I would love to see additional details while finding and viewing DSOs such as Dumbbell and Ring nebulae, see more details in Eagle, Trifid, etc. It would be awesome to find something that would also enhance galaxies too (M31, M33 etc.). Does anyone know if an O-III filter will perform better than my current UHC filter?