Which filter would be best for my SW 120ed

[djpaul]

Hi

Im using a Skywatcher 120ed Refractor

Which of the following filters would be best to buy for planetary and moon viewing

Baader Neodymium Filter

or 

Baader Semi APO Filter

Paul

[John]

I have an ED120 but I don't find I need a filter for viewing the moon. If I was forced to pick one of the above I guess it would be the Neodynium. The ED120 shows little or no chromatic abberation on the Moon (to my eyes) so the Semi-APO, which seems to combine the Neodymimum properties with a finge killer, is not going to produce any benefits as I see it.

Some folks find a variable polariser useful for this purpose. As I say though I don't find I need a filter with the ED120 or my 12" dobsonian for that matter.

[djpaul]

Many Thanks 

I will go for the cheaper one then

Didnt think i needed the APO but just wanted to check

Paul

[dweller25]

The Baader Neodymium will definitely increase the contrast with Jupiter and Mars

[Dave In Vermont]

For an excellent article on what filters are best for different objects, this is often regarded as the definitive one:

http://www.prairieastronomyclub.org/resources/by-dave-knisely/filter-performance-comparisons-for-some-common-nebulae/

I have a copy on my wall.

Clear & Dark Skies,

Dave