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New Refractor Coming What Filters Recommended ???

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#1 Dakota1


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Posted 07 May 2013 - 09:07 PM

Have a new Sky Watcher Pro 120ED Apo on its way. What filters should I consider getting especially for planet viewing? I have the OIII and a neutral density. Also considering a UHC filter. Feedback appreciated. Thanks Bill

#2 David Knisely

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Posted 07 May 2013 - 09:48 PM

For a good narrow-band "UHC-like" filter, I like the 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.

#3 youngamateur42


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Posted 08 May 2013 - 07:22 PM

one of the best filters for planetary use on pretty much every planet is a #80A blue filter, sometimes called the Jupiter filter (from Orion brands). This blue filter is amazing on Jupiter, I've easily picked out the Red Spot on Jupiter in a 70mm refractor, so that should provide some pretty astounding views. But this filter's only for planetary and lunar, they're of no use for deep sky observing. Glad to help!

#4 SeattleScott



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Posted 08 May 2013 - 11:23 PM

Yellow helps with seeing polar caps on Mars. Not sure how much benefit there is in getting UHC if you already have OIII.

#5 Sarkikos



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Posted 09 May 2013 - 06:13 AM

IME & IMO, the best general contrast filter for planets is the Baader Moon & Sky Glow. Magenta is very good for Mars.


#6 Jon Isaacs

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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.


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