Cheers!
I realised I made a rookie mistake of buying the narrow Baader OIII filter - I thought narrower = better as less light pollution creeps in, but now I see I'm probably losing out on some light with this O-III filter (I bought it to better highlight planetary nebula).
I guess I should try and sell it and get a better visual filter - it's a shame as I paid almost as much for it as the cost of an Astronomik OIII filter, oh well call it a learning experience
