I saw the baader filters on
www.aoe.com.au site
Baader UHC-S Nebula Filter The UHC-S delivers a darker sky and improved contrast over typical broadband 'Deep Sky Filters', but without sacrificing all the stars like other 'UHC' filters. The moderate 60nm passband and extreme efficiency makes this filter great for smaller scopes as well as the giants. Ideal for imaging, too (with >99% transmission of H-Alpha). This is what the site says about them. for under $115.00
Gazz