Alex
You may need a couple or a few filters.
If you're going to image with your newt then :
Baader MPCC is a must as already mentioned, buy the kit if you want to use it for visual as well .... ( $299 MyAstroShop ... $247 MPCC alone )
Baader 2" UV/IR cuts through the cosmic haze .... ( $150 MyAstroShop)
Hutech 2" IDAS LPS2 cuts out through the terrestrial haze .... ( US$200 - AUD$212 delivered from Hutech in US )
All up they will cost you around $600-650 depending on who you buy them from including shipping.
I've quoted what they cost me and who I bought them from.
